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Environmental Science

Problems, Concepts, and Solutions

TWELFTH EDITION

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Brief Contents

Detailed Contents v

Preface for Instructors xiii

Learning Skills1

HUMANS AND SUSTAINABILITY: AN OVERVIEW

1 Environmental Problems, Their Causes, and Sustainability5

ECOLOGY AND SUSTAINABILITY

2 Science, Matter, and Energy23

3 Ecosystems: What Are They and How Do They Work?38

4 Evolution and Biodiversity63

5 Climate and Biodiversity75

6 Community and Population Ecology105

7 Applying Population Ecology: Human Population and Urbanization123

SUSTAINING BIODIVERSITY

8 Sustaining Biodiversity: The Ecosystem Approach149

9 Sustaining Biodiversity: The Species Approach176

SUSTAINING RESOURCES AND ENVIRONMENTAL QUALITY

10 Food, Soil, and Pest Management198

11 Water and Water Pollution227

12 Geology and Nonrenewable Mineral Resources261

13 Energy279

14 Environmental Hazards and Human Health323

15 Air Pollution, Climate Change, and Ozone Depletion344

16 Solid and Hazardous Waste380

SUSTAINING HUMAN SOCIETIES

17 Environmental Economics, Politics, and Worldviews401

Supplements S1 Glossary G1 Index I1

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Detailed Contents

Learning Skills1

HUMANS AND SUSTAINABILITY: AN OVERVIEW

1Environmental Problems, Their Causes, and Sustainability5

CORE CASE STUDY Living in an Exponential Age5

KEY QUESTIONS AND CONCEPTS 6

1-1What Is an Environmentally Sustainable Society?6

1-2How Can Environmentally Sustainable Societies Grow Economically?10

1-3How Are Our Ecological Footprints Affecting the Earth?11

CASE STUDY China’s New Affluent Consumers13

1-4What Is Pollution and What Can We Do about It?14

1-5Why Do We Have Environmental Problems?15

CASE STUDY The Environmental Transformation of Chattanooga, Tennessee18

1-6What Are Four Scientific Principles of Sustainability?19

REVISITING Exponential Growth and Sustainability21

ECOLOGY AND SUSTAINABILITY

2Science, Matter, and Energy23

CORE CASE STUDY Carrying Out a Controlled Scientific Experiment23

KEY QUESTIONS AND CONCEPTS 24

2-1What Is Science?24

SCIENCE FOCUS Easter Island: Some Revisions in a Popular Environmental Story27

2-2What Is Matter?28

2-3How Can Matter Change?31

2-4What is Energy and How Can It Change Its Form?33

2-5How Can We Use Matter and Energy More Sustainably?35

REVISITING The Hubbard Brook Experimental Forest and Sustainability36

3Ecosystems: What Are They and How Do They Work?38

CORE CASE STUDY: Have You Thanked the Insects Today?38

KEY QUESTIONS AND CONCEPTS 39

3-1What Is Ecology?39

SCIENCE FOCUS Which Species Rule the World?40

3-2What Keeps Us and Other Organisms Alive?42

3-3What Are the Major Components of an Ecosystem?44

3-4What Is Biodiversity and Why Is It Important?48

SCIENCE FOCUS Soil Is the Base of Life on Land49

3-5What Happens to Energy in an Ecosystem?50

3-6What Happens to Matter in an Ecosystem?54

SCIENCE FOCUS Water’s Unique Properties55

3-7How Do Scientists Study Ecosystems?59

REVISITING Insects and Sustainability61

4Evolution and Biodiversity63

CORE CASE STUDY The Adaptability of Life on the Earth63

KEY QUESTIONS AND CONCEPTS 64

4-1What Is Biological Evolution and How Does It Occur?64

SCIENCE FOCUS How Did We Become Such a Powerful Species?66

4-2How Do Geological and Climate Changes Affect Evolution?66

4-3What Is an Ecological Niche?68

SCIENCE FOCUS Cockroaches: Nature’s Ultimate Survivors69

4-4How Do Extinction, Speciation, and Human Activities Affect Biodiversity?69

4-5How Might Genetic Engineering Affect Evolution?71

REVISITING The Adaptability of the Earth’s Life and Sustainability73

5Climate and Biodiversity75

CORE CASE STUDY Blowing in the Wind: Connections between Wind, Climate, and Biomes75

KEY QUESTIONS AND CONCEPTS 76

5-1What Factors Influence Climate?76

5-2How Does Climate Affect the Nature and Location of Biomes?80

SCIENCE FOCUS Staying Alive in the Desert84

5-3How Have We Affected the World’s Terrestrial Ecosystems?91

5-4What Are the Major Types of Aquatic Systems?92

5-5What Are the Major Ocean Zones and How Have We Affected Them?94

5-6What Are the Major Types of Freshwater Systems and How Have We Affected Them?100

REVISITING Winds and Sustainability 103

6Community and Population Ecology105

CORE CASE STUDY Why Should We Care about the American Alligator?105

KEY QUESTIONS AND CONCEPTS 106

6-1How Does Species Diversity Affect the Sustainability of a Community?106

SCIENCE FOCUS Community Sustainability: A Closer Look107

6-2What Roles Do Species Play in a Community?108

CASE STUDY Why Are Amphibians Vanishing?108

SCIENCE FOCUS Why Should We Protect Sharks?110

6-3How Do Species Interact?111

6-4How Do Communities Respond to Changing Environmental Conditions?115

6-5What Limits the Growth of Populations?117

Photo 2 Air pollution from an industrial plant in India.
Deb Kushal/Peter Arnold, Inc.
SuperStock
Photo 1 Tree plantation.

CASE STUDY Exploding White-Tailed Deer Populations in the United States120

REVISITING The American Alligator and Sustainability121

7Applying Population Ecology: Human Population and Urbanization123

CORE CASE STUDY The Ecocity Concept in Curitiba, Brazil123

KEY QUESTIONS AND CONCEPTS 124

7-1How Many People Can the Earth Support?124

CASE STUDY Are There Too Many of Us?126

7-2What Factors Influence Population Size?127

CASE STUDY The U.S. Population Is Growing Rapidly128

CASE STUDY The United States: A Nation of Immigrants130

7-3How Does a Population’s Age Structure Affect Its Growth or Decline?131

7-4How Can We Slow Population Growth?134

CASE STUDY Slowing Population Growth in China: The One-Child Policy135

CASE STUDY Slowing Population Growth in India136

7-5What Are the Major Population and Environmental Problems of Urban Areas?137

CASE STUDY Urbanization in the United States138

CASE STUDY Mexico City143

7-6How Does Transportation Affect Urban Development?144

7-7How Can Cities Become More Sustainable and Livable?146

REVISITING Curitiba, Population Growth, and Sustainability147

SUSTAINING BIODIVERSITY

8Sustaining Biodiversity: The Ecosystem Approach149

CORE CASE STUDY Reintroducing Wolves to Yellowstone149

KEY QUESTIONS AND CONCEPTS 150

8-1How Are We Affecting the Earth’s Biodiversity and Why Should We Protect It?150

8-2How Should We Manage and Sustain Forests?152

SCIENCE FOCUS Putting a Price Tag on Nature’s Ecological Services153

INDIVIDUALS MATTER Butterfly in a Redwood Tree155

SCIENCE FOCUS Certifying Sustainably Grown Timber158

8-3How Serious Is Tropical Deforestation and How Can It Be Reduced?160

INDIVIDUALS MATTER Wangari Maathai and Kenya’s Green Belt Movement163

Photo 3 Scarlet macaw in Brazil’s Amazon rain forest.
Ernest
Photo 4 Temperate deciduous forest, winter, Rhode Island (USA).
Paul W. Johnson/Biological
Photo Service

8-4How Should We Manage and Sustain Grasslands?163

8-5How Should We Manage and Sustain Parks and Nature Reserves?164

CASE STUDY Costa Rica—A Global Conservation Leader166

CASE STUDY Controversy over Wilderness Protection in the United States168

8-6What Is the Importance of Restoration Ecology?170

CASE STUDY Ecological Restoration of a Tropical Dry Forest in Costa Rica170

8-7How Can We Help Sustain Aquatic Biodiversity?171

8-8What Should Be Our Priorities for Protecting Biodiversity?173

REVISITING Wolves in Yellowstone National Park and Sustainability174

9Sustaining Biodiversity: The Species Approach176

CORE CASE STUDY A Disturbing Message from the Birds176

KEY QUESTIONS AND CONCEPTS 177

9-1What Role Do Humans Play in the Premature Extinction of Species?177

9-2Why Should We Care about Preventing Species Extinction?181

9-3How Do Humans Accelerate Species Extinction?182

CASE STUDY The Kudzu Vine186

9-4How Can We Protect Wild Species from Premature Extinction?190

CASE STUDY Controversy over the U.S. Endangered Species Act191

SCIENCE FOCUS Accomplishments of the Endangered Species Act193

9-5What is Reconciliation Ecology?194

CASE STUDY The Blackfoot Challenge—Reconciliation Ecology in Action195

REVISITING Declining Bird Populations and Sustainability196

SUSTAINING RESOURCES AND ENVIRONMENTAL QUALITY

10Food, Soil, and Pest Management198

CORE CASE STUDY Golden Rice: Grains of Hope or an Illusion?198

KEY QUESTIONS AND CONCEPTS 199

10-1How Can We Improve Food Security?199

10-2How Is Food Produced and How Might Food Production Change?201

CASE STUDY Industrialized Food Production in the United States202

Photo 5 Temperate rain forest at Olympic National Park in the U.S. state of Washington.
Photo 6 Cypress swamp, inland wetland in the U.S. state of Tennessee.
Newman and Associates/Phototake
Francois Suchel/Peter Arnold, Inc.

10-3How Serious Are Soil Erosion and Degradation and How Can They Be Reduced?204

10-4What Have the Green and Gene Revolutions Done for Food Security?209

10-5Are There Limits to Providing More Meat and Seafood?214

10-6How Can We Protect Crops from Pests?218

SCIENCE FOCUS Ecological Surprises221

10-7How Can We Produce Food More Sustainably?223

REVISITING Golden Rice and Sustainability225

11Water and Water Pollution227

CORE CASE STUDY Water Conflicts in the Middle East: A Preview of the Future?227

KEY QUESTIONS AND CONCEPTS 228

11-1Will We Have Enough Water?228

CASE STUDY Freshwater Resources in the United States230

11-2How Can We Increase Water Supplies?232

CASE STUDY The Aral Sea Disaster237

11-3How Can We Use Water More Sustainably?239

11-4How Can We Reduce the Threat of Flooding?243

CASE STUDY Living Dangerously on Floodplains in Bangladesh244

11-5How Can We Best Deal with Water Pollution?245

SCIENCE FOCUS Oxygen Depletion in the Northern Gulf of Mexico252

CASE STUDY The Chesapeake Bay Is an Estuary in Trouble252

SCIENCE FOCUS Treating Sewage by Working with Nature256

REVISITING Water Conflicts in the Middle East and Sustainability258

12Geology and Nonrenewable Mineral Resources261

CORE CASE STUDY The Nanotechnology Revolution261

KEY QUESTIONS AND CONCEPTS 262

12-1What Are the Earth’s Major Geological Processes?262

12-2What Are Minerals and Rocks and How are Rocks Recycled?266

12-3What Are the Harmful Environmental Effects of Using Mineral Resources?268

12-4How Long Will Mineral Resources Last?271

12-5How Can We Use Mineral Resources More Sustainably?274

CASE STUDY Industrial Ecosystems: Copying Nature275

REVISITING Nanotechnology and Sustainability277

Photo 7 Endangered southern sea otter in Monterey Bay, California (USA).
Tom and Pat Leeson, Ardea London Ltd.
Photo 8 Confiscated products made from endangered species.
Steve Hillebrand/U.S. Fish and Wildlife Service

13Energy279

CORE CASE STUDY How Long Will Supplies of Conventional Oil Last?279

KEY QUESTIONS AND CONCEPTS 280

13-1What Major Sources of Energy Do We Use?280

SCIENCE FOCUS Net Energy Is the Only Energy That Really Counts282

13-2What Are the Advantages and Disadvantages of Fossil Fuels?283

13-3What Are the Advantages and Disadvantages of Nuclear Energy?290

CASE STUDY Chernobyl: The World’s Worst Nuclear Power Plant Accident293

CASE STUDY Experts Disagree over What to Do with Radioactive Wastes in the United States295

13-4Why Is Energy Efficiency an Important Energy Resource?298

13-5What Are the Advantages and Disadvantages of Renewable Energy Resources?304

CASE STUDY Iceland Is a Sustainable Energy Laboratory316

13-6How Can We Make a Transition to a More Sustainable Energy Future?317

REVISITING Oil and Sustainability320

14Environmental Hazards and Human Health323

CORE CASE STUDY The Global HIV/AIDS Epidemic323

KEY QUESTIONS AND CONCEPTS 324

14-1What Major Health Hazards Do We Face?324

14-2What Types of Biological Hazards Do We Face?325

CASE STUDY The Growing Global Threat from Tuberculosis326

SCIENCE FOCUS Growing Germ Resistance to Antibiotics327

SCIENCE FOCUS A Nightmare Flu Scenario328

CASE STUDY Malaria—Death by Mosquito328

14-3What Types of Chemical Hazards Do We Face?332

14-4How Can We Evaluate Chemical Hazards?333

INDIVIDUALS MATTER Ray Turner and His Refrigerator337

14-5How Do We Perceive Risks and How Can We Avoid the Worst of Them?338

CASE STUDY Death from Smoking339

REVISITING AIDS and Sustainability342

15Air Pollution, Climate Change, and Ozone Depletion344

CORE CASE STUDY Studying a Volcano to Understand Climate Change344

KEY QUESTIONS AND CONCEPTS 345

15-1What Are the Major Air Pollution Problems?345

SCIENCE FOCUS Using Lichens to Detect Air Pollution348

15-2How Should We Deal with Air Pollution?356

15-3How Might the Earth’s Temperature and Climate Change in the Future?360

SCIENCE FOCUS What Is the Scientific Consensus about Future Global Temperature Changes?364

Photo 10 Overgrazed (left) and lightly grazed (right) rangeland.
Photo 9 Starving children collecting ants to eat in famine-stricken Sudan, Africa.
Harmut, Schwartzback/Peter Arnold, Inc.

15-4What Are Some Possible Effects of a Warmer Atmosphere?367

15-5What Can We Do about Global Warming?370

15-6How Have We Depleted Ozone in the Stratosphere and What Can We Do about It?376

INDIVIDUALS MATTER Sherwood Rowland and Mario Molina—A Scientific Story of Courage and Persistence376

REVISITING Volcanic Eruptions, Climate Change, and Sustainability378

16Solid and Hazardous Waste380

CORE CASE STUDY E-Waste—An Exploding Problem380

KEY QUESTIONS AND CONCEPTS 381

16-1What Are Solid Waste and Hazardous Waste, and Why Are They Problems?381

CASE STUDY Solid Waste in the United States382

16-2What Should We Do about Solid Waste?383

16-3Why is Reusing and Recycling Materials So Important?385

CASE STUDY We Can Use Refillable Containers386

INDIVIDUALS MATTER Recycling Plastics388

16-4What Are the Advantages and Disadvantages of Burning or Burying Solid Waste?389

16-5How Should We Deal With Hazardous Waste?392

SCIENCE FOCUS Mercury394

CASE STUDY Hazardous Waste Regulation in the United States396

CASE STUDY Dealing with Lead Poisoning—the Legal Approach397

16-6How Can We Make the Transition to a More Sustainable Low-Waste Society?398

REVISITING E-waste and Sustainability399

SUSTAINING HUMAN SOCIETIES

17Environmental Economics, Politics, and Worldviews401

CORE CASE STUDY Rescuing a River401

KEY QUESTIONS AND CONCEPTS 402

17-1How Are Economic Systems Related to the Biosphere?402

17-2How Can We Use Economic Tools to Deal with Environmental Problems?405

INDIVIDUALS MATTER Ray Anderson410

17-3How Can Reducing Poverty Help Us Deal with Environmental Problems?411

CASE STUDY Microloans to the Poor412

17-4How Can We Implement More Sustainable and Just Environmental Policies?415

CASE STUDY Managing Public Lands in the United States—Politics in Action417

17-5How Do the Major Environmental Worldviews Differ?423

SCIENCE FOCUS Biosphere 2—A Lesson in Humility424

17-6How Can We Live More Sustainably?425

REVISITING The Nashua River and Sustainability429

Photo 11 Ship stranded in desert formed by shrinkage of the Aral Sea.
Photo 12 Energy efficient, earth sheltered house with a green roof in Yorkshire, UK.
A. & J. Visage/Peter Arnold, Inc.
Martin Bond/Peter Arnold, Inc.

SUPPLEMENTS

1Measurement Units, Precision, and Accuracy Chapter 2 S2

2GraphingS4

3Maps of Global Economic, Population, and Hunger Data Chapters 1, 7, 8, 10, 17 S6

4Maps of Biodiversity, Ecological Footprints, and Environmental Performance Chapters 1, 3–11, 17 S12

5Overview of U.S. Environmental History Chapters1, 5, 8, 10, 17 S23

6Norse Greenland, Sumerian, and Icelandic Civilizations Chapters 1, 2, 8, 10, 13 S31

7Some Basic Chemistry Chapters 2, 3, 11, 12, 13, 14, 16 S32

8The Sulfur Cycle Chapters 3, 12, 13, 15 S39

9Classifying and Naming Species Chapters 3, 4, 6 S41

10Weather Basics, El Niño, Tornadoes, and Tropical Cyclones Chapters 5, 11, 15 S43

11Components and Interactions in Major Biomes

Chapters 5, 6, 8, 9 S48

12Earthquakes, Tsunamis, and Volcanic Eruptions

Chapters 5, 12, 14, 15 S54

13 CASE STUDY Whales and Whaling

Chapter 9 S58

14 CASE STUDY Mining Law of 1872 Chapters 12, 16, 17 S60

15Brief History and Possible Future of the Age of Oil Chapter 13 S61

16Maps of Energy Resources and Carbon Dioxide Emissions Chapters 13, 15, 17 S62

17Estimating the Toxicity of a Chemical Chapters14, 16 S71

18How to Analyze a Scientific Article Chapter 2 S73

19Key Concepts (by Chapter)S81

GlossaryG1

IndexI1

Photo 13 Photochemical smog in Mexico City, Mexico.
Photo 14 Air pollution damage to trees in Mount Mitchell State Park, North Carolina (USA).
Mark Edwards/Peter Arnold, Inc.
Carolina Biological/Visuals Unlimited

For Instructors

What’s New

In this edition, we build upon proven strengths of past editions with the following major new features:

■ A new concept-centered approach

■ A new design with 140 pieces of new art and 55new photos

■ A chapter-opening Core Case Study integrated throughout each chapter and connected at the end of each chapter to the sustainability theme that, as in previous editions, integrates the material in this book

This edition also introduces a new coauthor, Scott Spoolman, who has worked as a contributing editor on this and other environmental textbooks by Tyler Miller for more than 3 years. Please see About the Authors, p.xxi.

A New Concept-Centered Approach

Each major chapter section is built around one to three key concepts—a major new feature of this edition. These concepts state the most important take-away messages of each chapter. They are listed at the front of each chapter (see p. 39), and each chapter section begins with a key question and concepts (see pp. 39, 42, 44, 48, 50, 54, and 59), which are highlighted and referenced throughout each chapter.

Ainthemarginlinksthematerialineach chaptertoappropriatekeyconceptsinforegoingchapters(seepp.43,47,50,61,62).Thebook’skeyconceptsarealsocollectedandlistedbychapterforeasyreviewinSupplement19(p.S81)attheendofthisbook.

For the most part, these concepts have been distilled from the major sections of past editions. In some cases, the concept approach revealed a need for reorganization of material within or among sections to improve flow.

A New Design

Theconceptsapproachiswell-servedbyournewdesign,whichshowcasestheconcepts,corecasestudies, andothernewfeaturesaswellasprovenstrengths ofthistextbook.Thenewdesign(seeChapter5, pp.75–104)alsoincorporatesathoroughlyupdated artprogramwith140newfiguresand148upgraded figures.

Sustainability Remains as the Integrating Theme of This Book

Sustainability, a watchword of the 21st Century for those concerned about the environment, is the overarching theme of this concept-centered, solutions oriented, science-based, and flexible introductory environmental science textbook. In this edition, we showcase the sustainability theme even more to reflect its growing importance in understanding environmental problems and their solutions. You can see the sustainability emphasis by looking at the Brief Contents (p. iii).

Four scientific principles of sustainability play a major role in carrying out this book’s sustainability theme. These principles are introduced in Chapter 1, depicted in Figure 1–13 (p. 20 and the back cover of the student edition), and used throughout the book, with each reference marked in the margin by (see pp. 35, 47, 118, and 280).

Core Case Studies and the Sustainability Theme

Each chapter opens with a Core Case Study (p.198)—a new feature of this edition of Environmental Science—that is applied throughout the chapter. These connections to the Core Case Study are indicated in the book’s margin by. (See pp. 200, 201, 211, 212, 213, 214, 222, 225, and 226).

Each chapter ends with a Revisiting box (see p. 225), which connects the Core Case Study and other material in the chapter to the four scientific principles of sustainability. Thinking About exercises strategically placed throughout each chapter (see pp. 201, 203, 213, 214, and 215) challenge students to make these and other connections for themselves—another new feature of this edition.

Five Subthemes Guide the Way toward Sustainability

In the previous edition of this book, we used five major subthemes, which are carried on in this new edition: natural capital, natural capital degradation, solutions, tradeoffs, and individuals matter.

■ Natural capital. Sustainability depends on the natural resources and natural services that support all life and economies. Some 21 diagrams illustrate this subtheme. Examples are Figures 1-3 (p. 8), 5-21 (p. 94), and 8-3 (p.153).

■ Natural capital degradation. We describe how human activities can degrade natural capital, and some 31 diagrams illustrate this. Examples are Figures 1-6 (p. 12), 5-27 (p. 99), and 10-14 (p.212).

■ Solutions. Next comes the search for solutions to natural capital degradation and other environmental problems. We present proposed solutions in a balanced manner and challenge students to use critical thinking to evaluate them. Some 41 figures and many chapter sections and subsections present proven and possible solutions to various environmental problems. Examples are Figures 10-26 (p.224), 11-17 (p. 241), and 15-12 (p. 358).

■ Trade-Offs. The search for solutions involves tradeoffs, because any solution involves weighing advantages against disadvantages. Some 37 Trade-Offs diagrams present advantages and disadvantages of various environmental technologies and solutions to environmental problems. Examples are Figures7-22 (p. 145), 10-22 (p. 219), and 13-38 (p.314).

■ Individuals Matter. Throughout the book Individuals Matter boxes describe what various concerned citizens and scientists have done to help us achieve sustainability. (See pp. 163, 376, and 410). Also, 16 What Can You Do? boxes describe how readers can deal with the problems we face. Examples are Figures 11-19 (p. 242), 13-44 (p. 320), and 16-7 (p.385). Twelve especially important things individuals can do—the sustainability dozen—are summarized in Figure 17-19 (p. 428).

Science-Based Global Coverage

Chapters 2–9 present the scientific principles of ecology and biodiversity (see Brief Contents, p. iii) required for a basic understanding of how the earth works and for evaluating proposed solutions to environmental problems. Important environmental science topics are explored in depth in 23 new Science Focus boxes distributed among the chapters (see pp. 27, 49, and 282). Science is also integrated throughout the book in Case Studies (see p. 108–109 and 120–121) and in figures (see Figure 13-14, p. 291, and Figure 15-17, p. 361).

This book also provides a global perspective on two levels. First, ecological principles reveal how all the world’s life is connected and sustained within the biosphere (Chapter 3). Second, the book integrates information and images from around the world into its presentation of environmental problems and their possible solutions. To emphasize this feature we have added the labels “Global Outlook” and “Global Connec-

tions” to many of the book’s figures (see Figure 7-13, p.138, and Figure 14-11, p. 338) and maps in Supplements 3, 4, and 16.

ThomsonNOW, anonlinevisuallearningsupplement, allowsstudentstoenhancetheirscientificunderstandingbyviewinganimations,manyoftheminteractive, availableforthisbook.Thereare88 ThomsonNOW items forthistext,someofthemrelatedtofigures(seeFigure 3-12,p.48,andFigure5-15,p. 88)andotherstotext (seepp.79and154).

Two Levels of Flexibility

There are hundreds of ways to organize the content of this course to fit the needs of different instructors with a wide variety of professional backgrounds. Since the first edition of this book, our solution to this problem has been to design a highly flexible book that allows instructors to vary the order of chapters and sections within chapters.

We recommend that instructors start with Chapter 1 because it defines basic terms and gives an overview of sustainability, population, pollution, resources, and economic development issues that are treated throughout the book. This provides a springboard for instructors to use other chapters in almost any order.

Oneoften-usedstrategyistofollowChapter1with Chapters2–9,whichintroducebasicscienceandecologicalconcepts.Instructorscanthenusetheremaining chaptersinanyordertheydesire.SomeinstructorsfollowChapter1withChapter17onenvironmentaleconomics,politics,andworldviews,beforeproceedingto thechaptersonbasicscienceandecologicalconcepts.

Inthiseditionwehaveaddeda secondlevelofflexibility byproviding19Supplements(seep.xiiintheDetailedContentsandp.S1),whichinstructorscanassign tomeettheneedsoftheirspecificcourses.Examplesincludemapsofbiodiversityandecologicalfootprints (Supplement4),environmentalhistory(Supplements5 and6),basicchemistry(Supplement7),weatherbasics (Supplement10),earthquakes,tsunamis,andvolcanic eruptions(Supplement12),mapsofenergyresources (Supplement16),howtoanalyzeascientificarticle (Supplement18),andalistofthebook’skeyconcepts bychapter(Supplement19).Thesesupplementscontain30U.S.andglobalmapsthatprovideadatabaseof environmentalandeconomicinformation.Virtuallyall ofthismaterialisnewtothisedition.

Case Studies

Inadditiontothe17CoreCaseStudiesdescribedabove, 37additional CaseStudies (seepp.170–171,275–276, and316–317)appearthroughoutthebook.(Seeitems in BOLD typeintheDetailedContents,pp.v–xii.) Thetotalof54casestudiesprovidesanin-depthlook atspecificenvironmentalproblemsandtheirpossible solutions.

Critical Thinking

The introduction on Learning Skills describes critical thinking skills (pp. 1–4). Specific critical thinking exercises are used throughout the book in several ways:

■ As 105 Thinking About exercises—a new feature of this edition. This interactive approach to learning reinforces textual and graphic information and concepts by asking students to analyze material immediately after it is presented rather than waiting until the end of chapter (see pp. 13, 52, and 89).

■ In all boxes (except Individuals Matter boxes)

■ Inthecaptionsofmostofthebook’sfigures—anothernewfeatureofthisedition(seeFigure8-15, p.161; Figure11-28,p.254;and Figure13-22, p.301)

■ As 65 How Would You Vote? exercises (see pp. 285, 314, and 371).

■ As end-of-chapter questions (see pp. 104 and 259)

Visual Learning

Thisbook’s288diagrams—140ofthemnewtothis edition—aredesignedtopresentcomplexideasinunderstandablewaysrelatingtotherealworld.SeeFigures5-18(p.91),6-4(p.112), and 8-15 (p. 161).We havealsocarefullyselected118photographs—55of themnewtothisedition—toillustratekeyideas.See Figures11-7(p.233),15-19(p.363),and16-4 (p.383).Wehaveavoidedthecommonpracticeofincludingnumerous“filler”photographsthatarenot veryeffectiveorthatshowtheobvious.

Finally,toenhancevisuallearning,88 ThomsonNOW interactiveanimations,referencedtothetextanddiagrams,areavailableonline.Thislearningtool—newto thisedition—helpsstudentsassesstheiruniquestudy needsthroughpretests,posttests,andpersonalized learningplans.Theseanimationsareavailableatnoextracostwithnewcopiesofthebook.Accessmayalso bepurchasedseparately.Anotherfeatureofthislearningtool, HowDoIPrepare?, allowsstudentstoreview basicmath,chemistry,andotherrefresherskills.

Major Changes in This Edition: A Closer Look

Majorchangesinthisneweditionincludethefollowing:

■ New co-author (see p. xxi).

■ Concept-centered approach with each chapter section built around one to three Key Concepts that provide the most important messages of each chapter. Each chapter also links material to pertinent key concepts from previous chapters.

■ A new design serving the concept-centered approach and integration of Core Case Studies, with a completely upgraded art program, which includes

140 new figures. See Figures 3-19 (p. 56), 11-11 (p.235), and 16-5 (p. 384). The remaining 148figures have also been improved or updated.

■ Chapter-opening Core Case Study (p. 23) integrated throughout each chapter (pp. 24, 25, 26, 27,28, 29, 31, 36, and 37) and connected at the end of each chapter to the sustainability theme (p.36).

■ 55 carefully selected new photographs. See Figures5-11 (p. 83), 7-15 (p. 139), and 13-15 (p.292).

■ Expansion of the sustainability theme built around four scientific principles of sustainability (Figure 1-13, p. 20, and back cover of the student edition).

■ Science Focus boxes that provide greater depth on scientific concepts and on the work of environmental scientists (see pp. 110, 153, and 364–365).

■ A second level of flexibility in 19 optional supplements (see p. xii in the Detailed Contents and p. S1).

■ Addition of 105 Thinking About interactive exercises(pp. 162, 189, and 300) that reinforce learningby asking students to think critically about the implications of various environmental issues immediately after they are discussed in the text. This complements the ongoing How Would You Vote? feature.

■ Questionsinmanyfigure captionstoencouragestudentstothinkaboutandevaluatetheircontent.See Figures7-18(p.141),13-31 (p. 308), and 15-22 (p.371).

■ Research Frontier items to show students key areas that require more research (pp. 99, 301, and 385).

■ Sixteen Green Careers shown in green type in the text (pp. 159, 234, and 311, and Figure 17-11, p.414). Descriptions of many of these careers are available on the website.

■ Review Questions at the end of each chapter (pp. 196 and 321).

■ Active Graphing exercises on the websites for many chapters that involve students in the graphing and evaluation of data. A new supplement on graphing (pp. S4–S5) has been added.

■ More than 4,000 updates based on information and data published in 2004, 2005, 2006, and 2007.

■ Integration of material on the growing ecological and economic impacts of China and India throughout much of the book. (See pp. 13–14, 135–137, 288, 362, and Figure 11-24, p. 248).

■ More than 100 new or expanded topics including the 2005 Millennium Ecosystem Report (pp. 9, 58, 61, and elsewhere); expanded treatment of ecological footprints (pp. 12–13, Figure 7-2, p. 125, and Supplement 4, pp. S16–S18 and 20–21); impacts ofnew affluent consumers in China (Case Study,

pp. 13–14); expanded introduction to biodiversity (pp. 48–50); climate change, catastrophes, and evolution (pp. 66–68); tsunamis (pp. S54–S56 in Supplement 12); golden rice (Core Case Study, p.198); nanotechnology (Core Case Study, p. 261, and p. S38 in Supplement 7); world oil supplies (Core Case Study, p. 279); Canada’s oil sand reserves (pp. 285–286); using feebates to improve motor vehicle efficiency (p. 300); plug-in hybrid cars (pp. 300–301); expanded discussion ofethanol and biodiesel as fuels (pp. 313–315); Iceland’s vision of a renewable energy economy (Case Study, p. 316–317); the possibility of a global flu pandemic (Science Focus, p. 330); e-waste (Core Case Study, p. 380); maps of global economic, population, andhunger data (Supplement3, pp. S6–S11); environmental history (Supplement 5, pp. S23–S30); introduction to basic chemistry (Supplement 7, pp.S32–38); expanded treatment of weather basics (Supplement 10, pp.S43–S47); maps of energy resources and carbon dioxide emissions (Supplement 16, pp. S62–S70); how to analyze a scientific article (Supplement 18, pp. S73–S80); and a summary list of key concepts (Supplement 19, pp. S81–S84).

In-Text Study Aids

Eachchapterbeginswithalistof keyquestionsandconcepts torevealhowitisorganizedandwhatstudents willbelearning.Whenanewtermisintroducedand defined,itisprintedinboldfacetype,andallsuchterms aresummarizedintheglossaryattheendofthebook.

ThinkingAbout exercisesreinforcelearningbyasking studentstothinkcriticallyaboutenvironmentalissues immediatelyaftertheyarediscussedinthetext.The captionsofmanyfigurescontainquestionsthatinvolve studentsinthinkingaboutandevaluatingtheircontent.

Each chapter ends with a set of Review Questions (p.226), which help students review key material, and a set of Critical Thinking (p. 226) questions to encourage students to think critically and apply what they have learned to their lives.

Qualified users of this textbook have free access to the Companion Website for this book at http://www.thomsonedu.com/biology/miller

At this website they will find the following material for each chapter:

■ Learning objectives to help guide student reading and study of each chapter

■ Flash cards, which allow students to test their mastery of the terms and concepts to remember for each chapter

■ Chapter tests, which provide multiple-choice practice quizzes

■ Essays and information on a variety of environmental careers

■ Further readings, which lists major books and articles consulted in writing each chapter and suggests articles, books, and websites that provide additional information

■ A brief What Can You Do? list addressing key environmental problems

■ Weblinks, an extensive list of websites with news, research, and images related to individual sections of the chapter

■ WebTutor is available to qualified adopters of this textbook on WebCT or Blackboard. It provides access to a full array of study tools, including flash cards (with audio), practice quizzes, online tutorials, and weblinks.

■ Teachers and students using new copies of this textbook also have free and unlimited access to InfoTrac® College Edition for a full year. This fully searchable online library gives users access to complete environmental articles from several hundred periodicals dating back over the past 24 years.

Other student learning tools include:

■ Audio Tools for study and review. Students can purchase and download these study aids containing concept reviews, key terms, questions, clarifications of common misconceptions, and study tips.

■ EssentialStudySkillsforScienceStudents, byDanielD. Chiras.Thisbookincludeschaptersondeveloping goodstudyhabits;sharpeningmemory;gettingthe mostfromlectures,labs,andreadingassignments; improvingtest-takingabilities;andbecominga criticalthinker.Instructorscanhavethisbook bundledFREEwiththetextbook.

■ Laboratory Manual, by C. Lee Rockett and Kenneth J. Van Dellen. This manual includes a variety of laboratory exercises, workbook exercises, and projects that require a minimum of sophisticated equipment.

Supplements for Instructors

■ PowerLecture. ThisDVD,freetoadopters,allows youtocreatecustomlecturesusingmorethan 1,400piecesofhigh-resolutionartwork,images, andanimationsfrom ThomsonNOW andthetextbook,andcreateMicrosoft® PowerPointlectures usingtextslidesandtextbook figures.Thisprogram’seditingtoolsallowuseofslidesfromother lectures,modificationorremovaloffigurelabels andleaders,insertionofyourownslides,saving slidesasJPEGimages,andpreparationoflectures foruseontheWeb.

■ TransparencyMastersandAcetates. Includes200color acetatesoflineartfromthetextbookand300blackand-whitemastersheetsofkeydiagramsformaking overheadtransparencies.Freetoadopters.

■ ABCVideosforEnvironmentalScience. Theseinformativenewsstories,availableonDVD,containmore than30shortvideoclipsofcurrentnewsstorieson environmentalissuesfromaroundtheworld.

■ Instructor’sManual. Freetoadopters.Alsoavailable onPowerLecture.

■ TestBank. Freetoadopters.Alsoavailableon PowerLecture.

■ ExamView. Allowsaninstructortoeasilycreateand customizetests,seethemonthescreenexactlyas theywillprint,andprintthemout.

Other Textbook Options

Instructorswantingabookwithadifferentlengthand emphasiscanuseoneofthreeotherbookswrittenfor varioustypesofenvironmentalsciencecourses: Living intheEnvironment, fifteenthedition(628pages, Brooks/Cole2007), SustainingtheEarth:AnIntegrated Approach, eighthedition(324pages,Brooks/Cole,2007) and EssentialsofEcology, fourthedition(269pages, Brooks/Cole,2007).

Help Us Improve This Book

Let us know how you think this book can be improved. If you find any errors, bias, or confusing explanations, please e-mail us about them at

mtg89@hotmail.com spoolman@tds.net

Most errors can be corrected in subsequent printings of this edition, as well as in future editions.

Acknowledgments

Wewishtothankthemanystudentsandteacherswho haverespondedsofavorablytothe11previouseditions of EnvironmentalScience, the15editionsof Livinginthe Environment, the8editionsof SustainingtheEarth, and the4editionsof EssentialsofEcology, andwhohavecorrectederrorsandofferedmanyhelpfulsuggestionsfor improvement.Wearealsodeeplyindebtedtothemore than295reviewerswhopointedouterrorsandsuggestedmanyimportantimprovementsinthevarious editionsofthesefourbooks.

The members of the talented production team, listed on the copyright page, have made vital contributions as well. Our special thanks go to development editor Christopher Delgado, production editors Andy Marinkovich and Nicole Barone, copy editor Andrea Fincke, layout expert Bonnie Van Slyke, photo researcher Abigail Reip, artist Patrick Lane of ScEYEnce, assistant editors Jessica Kuhn and Lauren Oliveira, and Brooks/Cole’s hard-working sales staff. We also thank Keli Amann, Kristina Razmara, and the other members of the talented team who developed the multimedia, website, and advertising materials associated with this book.

We wish to thank Dean Goodwin for writing an excellent set of new review questions for each chapter in this book. We also thank C. Lee Rockett and Kenneth J. Van Dellen for developing the Laboratory Manual to accompany this book, and the people who have translated this book into eight different languages for use throughout much of the world.

We also deeply appreciate the opportunity to have worked with Jack Carey, biology publisher at Brooks/Cole, for 40 years before his recent retirement. We now are fortunate and excited to welcome and work with Yolanda Cossio as the new biology publisher at Brooks/Cole.

G. Tyler Miller, Jr. Scott Spoolman

Guest Essayists

Guest essays by the following authors are available on ThomsonNOW: M. Kat Anderson, ethnoecologist with the National Plant Center of the USDA’s Natural Resource Conservation Center; Lester R. Brown, president, Earth Policy Institute; Alberto Ruz Buenfil, environmental activist, writer, and performer; Robert D. Bullard, professor of sociology and director of the Environmental Justice Resource Center at Clark Atlanta University; Michael Cain, ecologist and adjunct professor at Bowdoin College; Herman E. Daly, senior research scholar at the School of Public Affairs, University of Maryland; Lois Marie Gibbs, director, Center for Health, Environment, and Justice; Garrett Hardin, professor emeritus (now deceased) of human ecology, University of California, Santa Barbara; John Harte, professor of energy and resources, University of California, Berkeley; Paul G. Hawken, environmental author and business leader; Jane Heinze-Fry, environmental educator; Paul F. Kamitsuja, infectiousdisease expert and physician; Amory B. Lovins, energy policy consultant and director of research,

Cumulative Reviewers

BarbaraJ.Abraham,HamptonCollege;DonaldD. Adams,StateUniversityofNewYorkatPlattsburgh; LarryG.Allen,CaliforniaStateUniversity,Northridge; SusanAllen-Gil,IthacaCollege;JamesR.Anderson, U.S.GeologicalSurvey;MarkW.Anderson,University ofMaine;KennethB.Armitage,UniversityofKansas; SamuelArthur,BowlingGreenStateUniversity;GaryJ. Atchison,IowaStateUniversity;ThomasW.H. Backman,LewisClarkStateUniversity;MarvinW. Baker,Jr.,UniversityofOklahoma;VirgilR.Baker, ArizonaStateUniversity;StephenW.Banks,Louisiana StateUniversityinShreveport;IanG.Barbour,Carleton College;AlbertJ.Beck,CaliforniaStateUniversity, Chico;EugeneC.Beckham,NorthwoodUniversity; DianeB.Beechinor,NortheastLakeviewCollege;W. Behan,NorthernArizonaUniversity;DavidBelt, JohnsonCountyCommunityCollege;KeithL. Bildstein,WinthropCollege;AndreaBixler,Clarke College;JeffBland,UniversityofPugetSound;RogerG. Bland,CentralMichiganUniversity;GradyBlountII, TexasA&MUniversity,CorpusChristi;LisaK.Bonneau, UniversityofMissouri–KansasCity;GeorgBorgstrom, MichiganStateUniversity;ArthurC.Borror,University ofNewHampshire;JohnH.Bounds,SamHoustonState University;LeonF.Bouvier,PopulationReference Bureau;DanielJ.Bovin,UniversitéLaval;JanBoyle, UniversityofGreatFalls;JamesA.Brenneman, UniversityofEvansville;MichaelF.Brewer,Resources fortheFuture,Inc.;MarkM.Brinson,EastCarolina University;DaleBrown,UniversityofHartford;Patrick

Rocky Mountain Institute; Bobbi S. Low, professor ofresource ecology, University of Michigan; John J. Magnuson, professor emeritus and former director of the University of Wisconsin Center for Limnology; Lester W. Milbrath, director of the research program in environment and society, State University of New York, Buffalo; Peter Montague, director, Environmental Research Foundation; Norman Myers, tropical ecologist and consultant in environment and development; David W. Orr, professor of environmental studies, Oberlin College; Noel Perrin, adjunct professor of environmental studies, Dartmouth College; David Pimentel, professor of insect ecology and agricultural sciences, Cornell University; John Pichtel, Ball State University; Andrew C. Revkin, environmental author and environmental reporter for the New York Times; Vandana Shiva, physicist, educator, environmental consultant; Nancy Wicks, ecopioneer and director of Round Mountain Organics; Donald Worster, environmental historian and professor of American history, University of Kansas

E.Brunelle,ContraCostaCollege;TerrenceJ.Burgess, SaddlebackCollegeNorth;DavidByman,Pennsylvania StateUniversity,Worthington–Scranton;MichaelL. Cain,BowdoinCollege;LyntonK.Caldwell,Indiana University;FaithThompsonCampbell,Natural ResourcesDefenseCouncil,Inc.;JohnS.Campbell, NorthwestCollege;RayCanterbery,FloridaState University;TedJ.Case,UniversityofSanDiego;Ann Causey,AuburnUniversity;RichardA.Cellarius, EvergreenStateUniversity;WilliamU.Chandler, WorldwatchInstitute;F.Christman,UniversityofNorth Carolina,ChapelHill;LuAnneClark,LansingCommunityCollege;PrestonCloud,UniversityofCalifornia, SantaBarbara;BernardC.Cohen,Universityof Pittsburgh;RichardA.Cooley,UniversityofCalifornia, SantaCruz;DennisJ.Corrigan;GeorgeCox,SanDiego StateUniversity;JohnD.Cunningham,KeeneState College;HermanE.Daly,UniversityofMaryland; RaymondF.Dasmann,UniversityofCalifornia,Santa Cruz;KingsleyDavis,HooverInstitution;EdwardE. DeMartini,UniversityofCalifornia,SantaBarbara; JamesDemastes,UniversityofNorthernIowa; CharlesE.DePoe,NortheastLouisianaUniversity; ThomasR.Detwyler,UniversityofWisconsin;Bruce DeVantier,SouthernIllinoisUniversityCarbondale; PeterH.Diage,UniversityofCalifornia,Riverside; StephanieDockstader,MonroeCommunityCollege; LonD.Drake,UniversityofIowa;MichaelDraney, UniversityofWisconsin–GreenBay;DavidDuBose, ShastaCollege;DietrichEarnhart,University of Kansas;

Robert East, Washington & Jefferson College; T. Edmonson, University of Washington; Thomas Eisner, Cornell University; Michael Esler, Southern Illinois University; David E. Fairbrothers, Rutgers University; Paul P. Feeny, Cornell University; Richard S. Feldman, Marist College; Vicki Fella-Pleier, La Salle University; Nancy Field, Bellevue Community College; Allan Fitzsimmons, University of Kentucky; Andrew J. Friedland, Dartmouth College; Kenneth O. Fulgham, Humboldt State University; Lowell L. Getz, University of Illinois at Urbana–Champaign; Frederick F. Gilbert, Washington State University; Jay Glassman, Los Angeles Valley College; Harold Goetz, North Dakota State University; Srikanth Gogineni, Axia College of University of Phoenix; Jeffery J. Gordon, Bowling Green State University; Eville Gorham, University ofMinnesota;MichaelGough,Resourcesforthe Future;Ernest M. Gould, Jr., Harvard University; Peter Green, Golden West College; Katharine B. Gregg, WestVirginia Wesleyan College; Paul K. Grogger, University of Colorado at Colorado Springs; L. Guernsey, Indiana State University; Ralph Guzman, University of California, Santa Cruz; Raymond Hames,University of Nebraska, Lincoln; Robert Hamilton IV, Kent State University, Stark Campus; Raymond E. Hampton, Central Michigan University; Ted L. Hanes, California State University, Fullerton; William S. Hardenbergh, Southern Illinois University atCarbondale; John P. Harley, Eastern Kentucky University; Neil A. Harriman, University of Wisconsin, Oshkosh; Grant A. Harris, Washington State University; Harry S. Hass, San Jose City College; Arthur N. Haupt, Population Reference Bureau; Denis A. Hayes, environmental consultant; Stephen Heard, University of Iowa; Gene Heinze-Fry, Department of Utilities, Commonwealth of Massachusetts; Jane Heinze-Fry, environmental educator; John G. Hewston, Humboldt State University; David L. Hicks, Whitworth College; Kenneth M. Hinkel, University of Cincinnati; Eric Hirst, Oak Ridge National Laboratory; Doug Hix, University ofHartford;S.Holling,UniversityofBritishColumbia; SueHolt,CabrilloCollege;DonaldHoltgrieve,California State University, Hayward; Michelle Homan, Gannon University; Michael H. Horn, California State University, Fullerton; Mark A. Hornberger, Bloomsberg University; Marilyn Houck, Pennsylvania State University; Richard D. Houk, Winthrop College; Robert J. Huggett, College of William and Mary; Donald Huisingh, North Carolina State University; Catherine Hurlbut, Florida Community College at Jacksonville; Marlene K. Hutt, IBM; David R. Inglis, University of Massachusetts; Robert Janiskee, University of South Carolina; Hugo H. John, University of Connecticut; Brian A. Johnson, University of Pennsylvania, Bloomsburg; David I. Johnson, Michigan State University; Mark Jonasson, Crafton Hills College; Zoghlul Kabir, Rutgers/New Brunswick; Agnes Kadar, Nassau Community College; Thomas L. Keefe, Eastern Kentucky University; David Kelley, University of St.

Thomas; William E. Kelso, Louisiana State University; Nathan Keyfitz, Harvard University; David Kidd, University of New Mexico; Pamela S. Kimbrough; Jesse Klingebiel, Kent School; Edward J. Kormondy, University of Hawaii–Hilo/West Oahu College; John V. Krutilla, Resources for the Future, Inc.; Judith Kunofsky, Sierra Club; E. Kurtz; Theodore Kury, State University of New York at Buffalo; Steve Ladochy, University of Winnipeg; Troy A. Ladine, East Texas Baptist University; Anna J. Lang, Weber State University; Mark B. Lapping, Kansas State University; L. MichaelLarsen,CampbellUniversity;LindaLee, University of Connecticut; Tom Leege, Idaho Department of Fish and Game; Maureen Leupold, Genesee Community College; William S. Lindsay, Monterey Peninsula College; E. S. Lindstrom, Pennsylvania State University; M. Lippiman, New York University Medical Center; Valerie A. Liston, University of Minnesota; Dennis Livingston, Rensselaer Polytechnic Institute; James P. Lodge, air pollution consultant; Raymond C.Loehr, University of Texas at Austin; Ruth Logan, Santa Monica City College; Robert D. Loring, DePauw University; Paul F. Love, Angelo State University; Thomas Lovering, University of California, Santa Barbara; Amory B. Lovins, Rocky Mountain Institute; Hunter Lovins, Rocky Mountain Institute; Gene A. Lucas, Drake University; Claudia Luke; David Lynn; Timothy F. Lyon, Ball State University; Stephen Malcolm, Western Michigan University; Melvin G. Marcus, Arizona State University; Gordon E. Matzke, Oregon State University; Parker Mauldin, Rockefeller Foundation; Marie McClune, The Agnes Irwin School (Rosemont, Pennsylvania); Theodore R. McDowell, California State University; Vincent E. McKelvey, U.S. Geological Survey; Robert T. McMaster, Smith College; John G. Merriam, Bowling Green State University; A. Steven Messenger, Northern Illinois University; John Meyers, Middlesex Community College; Raymond W. Miller, Utah State University; Arthur B. Millman, University of Massachusetts, Boston; Sheila Miracle, Southeast Kentucky Community & Technical College; Fred Montague, University of Utah; Rolf Monteen, California Polytechnic State University; Debbie Moore, Troy University Dothan Campus; Michael K. Moore, Mercer University; Ralph Morris, Brock University, St. Catherine’s, Ontario, Canada; Angela Morrow, Auburn University;WilliamW.Murdoch,Universityof California,SantaBarbara;NormanMyers,environmentalconsultant;BrianC.Myres,CypressCollege;A. Neale,IllinoisStateUniversity;DuaneNellis,Kansas StateUniversity;JanNewhouse,UniversityofHawaii, Manoa;JimNorwine,TexasA&MUniversity,Kingsville; JohnE.Oliver,IndianaStateUniversity;MarkOlsen, UniversityofNotreDame;CarolPage,copyeditor;Eric Pallant,AlleghenyCollege;BillPaletski,PennState University;CharlesF.Park,StanfordUniversity;Richard J.Pedersen,U.S.DepartmentofAgriculture,Forest Service;DavidPelliam,BureauofLandManagement, U.S.Department of Interior; Murray Paton Pendarvis,

Southeastern Louisiana University; Dave Perault, Lynchburg College; Rodney Peterson, Colorado State University; Julie Phillips, De Anza College; John Pichtel, Ball State University; William S. Pierce, Case Western Reserve University; David Pimentel, Cornell University; Peter Pizor, Northwest Community College; Mark D. Plunkett, Bellevue Community College; Grace L. Powell, University of Akron; James H. Price, Oklahoma College; Marian E. Reeve, Merritt College; Carl H. Reidel, University of Vermont; Charles C. Reith, Tulane University; Roger Revelle, California State University, San Diego; L. Reynolds, University of Central Arkansas; Ronald R. Rhein, Kutztown University of Pennsylvania; Charles Rhyne, Jackson State University; Robert A. Richardson, University of Wisconsin; Benjamin F. Richason III, St. Cloud State University; Jennifer Rivers, Northeastern University; Ronald Robberecht, University of Idaho; William Van B. Robertson, School of Medicine, Stanford University; C. Lee Rockett, Bowling Green State University; Terry D. Roelofs, Humboldt State University; Daniel Ropek, Columbia George Community College; Christopher Rose, California Polytechnic State University; Richard G. Rose, West Valley College; Stephen T. Ross, University of Southern Mississippi; Robert E. Roth, Ohio State University; Dorna Sakurai, Santa Monica College; Arthur N. Samel, Bowling Green State University; Shamili Sandiford, College of DuPage; Floyd Sanford, Coe College; David Satterthwaite, I.E.E.D., London; Stephen W. Sawyer, University of Maryland; Arnold Schecter, State University of New York; Frank Schiavo,San Jose State University; William H. Schlesinger, Ecological Society of America; Stephen H. Schneider, National Center for Atmospheric Research; Clarence A. Schoenfeld, University of Wisconsin, Madison; Madeline Schreiber, Virginia Polytechnic Institute; Henry A. Schroeder, Dartmouth Medical School; Lauren A. Schroeder, Youngstown State University; Norman B. Schwartz, University of Delaware;GeorgeSessions,SierraCollege;DavidJ. Severn,ClementAssociates;DonSheets,Gardner-Webb University;PaulShepard,PitzerCollegeandClaremont GraduateSchool;MichaelP.Shields,SouthernIllinois UniversityatCarbondale;KennethShiovitz;F.Siewert, BallStateUniversity;E.K.Silbergold,Environmental DefenseFund;JosephL.Simon,UniversityofSouth

Florida;WilliamE.Sloey,UniversityofWisconsin, Oshkosh;RobertL.Smith,WestVirginiaUniversity;Val Smith,UniversityofKansas;HowardM.Smolkin,U.S. EnvironmentalProtectionAgency;PatriciaM.Sparks, GlassboroStateCollege;JohnE.Stanley,Universityof Virginia;MelStanley,CaliforniaStatePolytechnic University,Pomona;RichardStevens,MonroeCommunityCollege;NormanR.Stewart,Universityof Wisconsin,Milwaukee;FrankE.Studnicka,University ofWisconsin,Platteville;ChrisTarp,ContraCosta College;RogerE.Thibault,BowlingGreenState University;WilliamL.Thomas,CaliforniaState University,Hayward;ShariTurney,copyeditor;JohnD. Usis,YoungstownStateUniversity;TincoE.A.van Hylckama,TexasTechUniversity;RobertR.VanKirk, HumboldtStateUniversity;DonaldE.VanMeter,Ball StateUniversity;RickVanSchoik,SanDiegoState University;GaryVarner,TexasA&MUniversity;JohnD. Vitek,OklahomaStateUniversity;HarryA.Wagner, VictoriaCollege;LeeB.Waian,SaddlebackCollege; WarrenC.Walker,StephenF.AustinStateUniversity; ThomasD.Warner,SouthDakotaStateUniversity; KennethE.F.Watt,UniversityofCalifornia,Davis; AlvinM.Weinberg,InstituteofEnergyAnalysis,Oak RidgeAssociatedUniversities;BrianWeiss;Margery Weitkamp,JamesMonroeHighSchool(GranadaHills, California);AnthonyWeston,StateUniversityofNew YorkatStonyBrook;RaymondWhite,SanFrancisco CityCollege;DouglasWickum,UniversityofWisconsin, Stout;CharlesG.Wilber,ColoradoStateUniversity; NancyLeeWilkinson,SanFranciscoStateUniversity; JohnC.Williams,CollegeofSanMateo;RayWilliams, RioHondoCollege;RobertaWilliams,Universityof Nevada,LasVegas;SamuelJ.Williamson,NewYork University;DwinaWillis,Freed-HardemanUniversity; TedL.Willrich,OregonStateUniversity;JamesWinsor, PennsylvaniaStateUniversity;FredWitzig,University ofMinnesotaatDuluth;MarthaWolfe,Elizabethtown CommunityandTechnicalCollege;GeorgeM. Woodwell,WoodsHoleResearchCenter;ToddYetter, UniversityoftheCumberlands;RobertYoerg,Belmont HillsHospital;HideoYonenaka,SanFranciscoState University;BrendaYoung,DaemenCollege;Anita Závodská,BarryUniversity;MalcolmJ.Zwolinski, UniversityofArizona.

About the Authors

G. Tyler Miller, Jr.

G. Tyler Miller, Jr., has written 54 textbooks for introductory courses in environmental science, basic ecology, energy, and environmental chemistry. Since 1975, Miller’s books have been the most widely used textbooks for environmental science in the United States and throughout the world. They have been used by almost 3 million students and have been translated into eight languages.

MillerhasaPh.D.fromtheUniversityofVirginia andhasreceivedtwohonorarydoctoratedegreesforhis contributionstoenvironmentaleducation.Hetaught collegefor20yearsanddevelopedaninnovativeinterdisciplinaryundergraduatescienceprogrambeforedecidingtowriteenvironmentalsciencetextbooksfull timein1975.Currently,heisthePresidentofEarthEducationandResearch.

Hedescribeshishopesforthefutureasfollows:

Scott Spoolman

Scott Spoolman is a writer and textbook editor with more than 25 years of experience in educational publishing. He has worked with Tyler Miller since 2003 as a contributing editor on two editions each of Living in the Environment and Environmental Science and one edition of Sustaining the Earth.

Spoolman holds a master’s degree in science journalism from the University of Minnesota. He has authored numerous articles in the fields of science, environmental engineering, politics, and business. He worked as an acquisitions editor on a series of forestry textbooks. He has also worked as a consulting editor in the development of more than 70 textbooks in fields of the natural and social sciences.

In his free time, he enjoys exploring the forests and waters of his native Wisconsin along with his family— his wife, environmental educator Gail Martinelli, and his children, Will and Katie.

Spoolman has the following to say about this new stage in his collaboration with Tyler Miller:

If I had to pick a time to be alive, it would be the next 75years. Why? First, there is overwhelming scientific evidence that we are in the process of seriously degrading our own life support system. In other words, we are living unsustainably. Second, within your lifetime we have the opportunity to learn how to live more sustainably by working with the rest of nature, as described in this book.

Iamfortunatetohavethreesmart,talented,and wonderfulsons—Greg,David,andBill—wholivewith smallecologicalfootprints.Iamespeciallyprivilegedto haveKathleenPaulMillerasmybrilliantandbeautiful (insideandout)wife,bestfriend,andresearchassociate. Sheismyhero.Idedicatethisbooktoherandtotheearth.

In this new edition, I want to introduce you to Scott Spoolman, a talented new coauthor. He has greatly improved this book and shares my lifelong passion for trying to make the earth a better place to live for all.

IamhonoredtobejoiningwithTylerMillerasacoauthor tocontinuetheMillertraditionofthorough,clear,and engagingwritingaboutthevastandcomplexfieldof environmentalscience.ThisisthegreatestandmostrewardingchallengeIhaveeverfaced.IshareTylerMiller’s passionforensuringthatthesetextbooksandtheir multimediasupplementsarevaluabletoolsforstudents andinstructors.Tothatend,westrivetointroducethis fieldinwaysthatwillbeinformativeandsobering,but alsotantalizingandmotivational.

If the flip side of any problem is an opportunity, then this truly is one of the most exciting times ever for students to start an environmental career. Environmental problems are numerous, serious, and daunting, but their possible solutions generate exciting new career opportunities. Inspiring students with these possibilities, challenging them to maintain a scientific focus, pointing them toward fulfilling careers, and in doing so, working to help sustain life on earth—these priorities are what make this work extremely rewarding.

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Learning Skills

Students who can begin early in their lives to think of things as connected, even if they revise their views every year, have begun the life of learning.

Why Is It Important to Study Environmental Science?

Welcometo environmentalscience—an interdisciplinary studyofhowtheearthworks,howweinteractwiththe earth,andhowwecandealwiththeenvironmentalproblemsweface.Environmentalissuesaffecteverypartof yourlife.Thus,theconcepts,information,andissuesdiscussedinthisbookandthecourseyouaretakingshouldbe usefultoyounowandthroughoutyourlife.

Understandably,wearebiased.But westronglybelieve thatenvironmentalscienceisthesinglemostimportantcoursein youreducation. Whatcouldbemoreimportantthanlearning howtheearthworks,howweareaffectingitslife-support system,andhowwecanreduceourenvironmentalimpact?

We live in an incredibly challenging era. There is growing awareness that during this century we need to make a new cultural transition in which we learn how to live more sustainably by not continuing to degrade our life-support system. We hope this book will stimulate you to become involved in this change in the way we view and treat the earth that sustains us, our economies, and all other living things.

Ways to Improve Your Study and Learning Skills

Maximizing your ability to learn should be one of your most important lifetime educational goals. It involves continually trying to improve your study and learning skills. Here are some suggestions for doing so:

Develop a passion for learning. According to renowned biologist E.O. Wilson, “The basic ingredient for a love of learning is the same as for romantic love, or love of country, or of God: passion for a particular subject.”

Get organized. Becoming more efficient at studying gives you more time for other interests.

Make daily to-do lists in writing. Put items in order of importance, focus on the most important tasks, and assign a time to work on these items. Because life is full of uncertainties, you might be lucky to accomplish half of the items on your daily list. Shift your schedule as needed to accomplish the most important items.

Setupastudyroutineinadistraction-freeenvironment. Developawrittendailystudyscheduleandsticktoit.Study inaquiet,well-lightedspace.Worksittingatadeskor table—notlyingdownonacouchorbed.Takebreaksevery hourorso.Duringeachbreak,takeseveraldeepbreaths andmovearoundtohelpyoustaymorealertandfocused.

Avoid procrastination—putting work off until another time. Do not fall behind on your reading and other assignments. Set aside a particular time for studying each day and make it a part of your daily routine.

Do not eat dessert first. Otherwise, you may never get to the main meal (studying). When you have accomplished your study goals, reward yourself with play (dessert).

Make hills out of mountains. It is psychologically difficult to climb a mountain, which is what reading an entire book, reading a chapter in a book, writing a paper, or cramming to study for a test can feel like. Instead, break these large tasks (mountains) down into a series of small tasks (hills). Each day read a few pages of a book or chapter, write a few paragraphs of a paper, and review what you have studied and learned. As American automobile designer and builder Henry Ford put it, “Nothing is particularly hard if you divide it into small jobs.”

Lookatthebigpicturefirst. Getanoverviewofanassigned readinginthisbookbylookingatthe KeyQuestionsand Concepts boxatthebeginningofeachchapter.ItlistsKey QuestionsexploredinthechaptersectionsandthecorrespondingKeyConcepts,whicharethekeylessonstobe learnedinthechapter.Usethisasachapterroadmap. Whenyoufinishachapteryoucanalsouseitasareview. Youwillfindthebook’skeyconcepts,listedbychapter,in Supplement19onpp.S81–S84.

Askandanswerquestionsasyouread. Forexample,whatis themainpointofaparticularsubsectionorparagraph? RelateyourownquestionstotheKeyQuestionsandKey Conceptsbeingaddressedineachmajorchaptersection.In thisway,youcanfleshoutachapteroutline,tohelpyouunderstandthechaptermaterial.Youmayevenwanttodo suchanoutlineinwriting.

Focus on key terms. Use the glossary in your textbook to look up the meaning of terms or words you do not understand. This book shows all key terms in boldface type and

lesser, but still important, terms in italicized type. Flash cards for testing your mastery of key terms for each chapter are available on the website for this book, or you can make your own by putting a term on one side of an index card or piece of paper and its meaning on the other side.

Interactwithwhatyouread. Wedothisbymarkingkey sentencesandparagraphswithahighlighterorpen.We putanasteriskinthemarginnexttoanideawethinkis importantanddoubleasterisksnexttoanideawethink isespeciallyimportant.Wewritecommentsinthemargins,suchas Beautiful,Confusing,Misleading, or Wrong. Wefolddownthetopcornersofpageswithhighlighted passagesandthetopandbottomcornersofespecially importantpages.Thisway,wecanflipthroughachapter orbookandquicklyreviewthekeyideas.

Review to reinforce learning. Before each class, review the material you learned in the previous class and read the assigned material.

Become a better note taker. Do not try to take down everything your instructor says. Instead, write down main points and key facts using your own shorthand system. Review, fill in, and organize your notes as soon as possible after each class.

Write out answers to questions to focus and reinforce learning. Answer the critical thinking questions found in Thinking About boxes throughout chapters, in many figure captions, and at the end of each chapter. These questions are designed to have you think critically about key ideas and connect them to other ideas and your own lifestyle. Also, answer the review questions found at the end of each chapter. The website for each chapter also has a more detailed list of review questions. Writing out your answers to the critical thinking and review questions can reinforce your learning. Save your answers for review and preparation for tests.

Use the buddy system. Study with a friend or become a member of a study group to compare notes, review material, and prepare for tests. Explaining something to someone else is a great way to focus your thoughts and reinforce your learning. Attend any review sessions offered by instructors or teaching assistants.

Learn your instructor’s test style. Does your instructor emphasize multiple-choice, fill-in-the-blank, true-orfalse, factual, thought, or essay questions? How much of the test will come from the textbook and how much from lecture material? Adapt your learning and studying methods to this style. You may disagree with this style and feel that it does not adequately reflect what you know. But the reality is that your instructor is in charge.

Become a better test taker. Avoid cramming. Eat well and get plenty of sleep before a test. Arrive on time or early. Calm yourself and increase your oxygen intake by taking several deep breaths. (Do this also about

every 10–15 minutes while taking the test.) Look over the test and answer the questions you know well first. Then work on the harder ones. Use the process of elimination to narrow down the choices for multiple-choice questions. Paring them down to two choices gives you a 50% chance of guessing the right answer. For essay questions, organize your thoughts before you start writing. If you have no idea what a question means, make an educated guess. You might get some partial credit and avoid getting a zero. Another strategy for getting some credit is to show your knowledge and reasoning by writing something like this: “If this question means so and so, then my answer is ________.”

Develop an optimistic but realistic outlook. Try to be a “glass is half-full” rather than a “glass is half-empty” person. Pessimism, fear, anxiety, and excessive worrying (especially over things you cannot control) are destructive and lead to inaction. Try to keep your energizing feelings of realistic optimism slightly ahead of any immobilizing feelings of pessimism. Then you will always be moving forward.

Take time to enjoy life. Every day, take time to laugh and enjoy nature, beauty, and friendship. Becoming an effective and efficient learner is the best way to do this without falling behind in your work and living under a cloud of guilt and anxiety.

You Can Improve Your Critical Thinking Skills: Becoming a Good Baloney Detector

Criticalthinking involvesdevelopingskillstoanalyzeinformationandideas,judgetheirvalidity,andmakedecisions.Criticalthinkinghelpsyoutodistinguishbetween factsandopinions,evaluateevidenceandarguments, takeanddefendinformedpositionsonissues,integrate informationandseerelationships,andapplyyour knowledgetodealingwithnewanddifferentproblems andtoyourownlifestylechoices.Herearesomebasic skillsforlearninghowtothinkmorecritically.

Question everything and everybody. Be skeptical, as any good scientist is. Do not believe everything you hear or read, including the content of this textbook, without evaluating the information you receive. Seek other sources and opinions. As the famous physicist and philosopher Albert Einstein put it, “The important thing is not to stop questioning.”

Identify and evaluate your personal biases and beliefs. Eachofushasbiasesandbeliefstaughttousbyour parents,teachers,friends,rolemodels,andexperience.Whatareyourbasicbeliefs,values,andbiases? Wheredidtheycomefrom?Whatassumptionsare theybasedon?Howsureareyouthatyourbeliefs, values,andassumptionsarerightandwhy?According totheAmericanpsychologistandphilosopherWilliam

James,“Agreatmanypeoplethinktheyarethinking whentheyaremerelyrearrangingtheirprejudices.”

Be open-minded and flexible. Be open to considering different points of view. Suspend judgment until you gather more evidence, and be capable of changing your mind. Recognize that there may be a number of useful and acceptable solutions to a problem and that very few issues are black or white. There are trade-offs involved in dealing with any environmental issue, as you will learn in this book. One way to evaluate divergent views is to try to take the viewpoints of other people. How do they see the world? What are their basic assumptions and beliefs? Are their positions logically consistent with their assumptions and beliefs?

Be humble about what you know. Some people are so confident in what they know that they stop thinking and questioning. To paraphrase American writer Mark Twain, “It’s not what we don’t know that’s so bad. It’s what we know is true, but just ain’t so, that hurts us.”

Evaluatehowtheinformationrelatedtoanissuewas obtained. Arethestatementsyouheardorreadbased onfirsthandknowledgeandresearchoronhearsay? Areunnamedsourcesused?Istheinformationbased onreproducibleandwidelyacceptedscientificstudies (reliablescience, p.26)oronpreliminaryscientificresults thatmaybevalidbutneedfurthertesting(incomplete or frontierscience, p.26)?Istheinformationbasedonafew isolatedstoriesorexperiences(anecdotalinformation)or oncarefullycontrolledstudieswiththeresultsreviewed byexpertsinthefieldinvolved(peerreview)?Isit basedonunsubstantiatedanddubiousscientificinformationorbeliefs(unreliablescience, p.27)?

Questiontheevidenceandconclusionspresented. Whataretheconclusionsorclaims?Whatevidenceis presentedtosupportthem?Doestheevidencesupport them?Isthereaneedtogathermoreevidencetotest theconclusions?Arethereother,morereasonable conclusions?

Trytouncoverdifferencesinbasicbeliefsandassumptions. Onthesurfacemostargumentsordisagreements involvedifferencesinopinionsaboutthevalidityor meaningofcertainfactsorconclusions.Scratchalittle deeperandyouwillfindthatmostdisagreementsare usuallybasedondifferent(andoftenhidden)basicassumptionsabouthowwelookatandinterpretthe worldaroundus.Uncoveringthesebasicdifferencescan allowthepartiesinvolvedtounderstandwhereeachis “comingfrom”andtoagreetodisagreeabouttheirbasic assumptions,beliefs,orprinciples.

Try to identify and assess any motives on the part of those presenting evidence and drawing conclusions. What is their expertise in this area? Do they have any unstated assumptions, beliefs, biases, or values? Do they have a personal agenda? Can they benefit financially or politically from acceptance of their evidence

and conclusions? Would investigators with different basic assumptions or beliefs take the same data and come to different conclusions?

Expectandtolerateuncertainty. Recognizethatscience isanever-changingadventurethatprovidesonlyacertaindegreeofcertainty.Andthemorecomplexthesystemorprocessbeinginvestigated,thegreaterthedegree ofuncertainty.Scientistscandisprovethingsbutthey cannotestablishabsoluteprooforcertainty.

Dotheargumentsusedinvolvelogicalfallaciesordebatingtricks? Herearesixofmanyexamples. First, attack thepresenterofanargumentratherthantheargument itself. Second, appealtoemotionratherthanfactsand logic. Third, claimthatifonepieceofevidenceorone conclusionisfalse,thenallotherrelatedpiecesofevidenceandconclusionsarefalse. Fourth, saythataconclusionisfalsebecauseithasnotbeenscientifically proven(scientistsneverproveanythingabsolutely,but theycanoftenestablishhighdegreesofreliability,as discussedonpp.27–28). Fifth, injectirrelevantormisleadinginformationtodivertattentionfromimportant points. Sixth, presentonlyeither/oralternativeswhen theremaybeanumberofoptions.

DonotbelieveeverythingyoureadontheInternet. The Internetisawonderfulandeasilyaccessiblesourceof information,includingalternativeexplanationsand opinionsonalmostanysubjectorissue—muchofitnot availableinthemainstreammediaandscholarlyarticles.Weblogs,orblogs,havebecomeamajorsourceof information,evenmoreimportantthanstandardnews mediaforsomepeople.However,becausetheInternet issoopen,anyonecanpostanythingtheywanttoa blogorotherwebsitewithnoeditorialcontrolorreviewbyexperts.Asaresult,evaluatinginformationon theInternetisoneofthebestwaysinwhichyoucan putintopracticetheprinciplesofcriticalthinkingdiscussedhere.UseandenjoytheInternet,butthinkcriticallyandproceedwithcaution.

Developprinciplesorrulesforevaluatingevidence. Developawrittenlistofprinciplestoserveasguidelines forevaluatingevidenceandclaims.Continuallyevaluateandmodifythislistonthebasisofyourexperience.

Become a seeker of wisdom, not a vessel of information. Many people believe that the main goal of education is to learn as much as you can by concentrating on gathering more and more information. We believe that the primary goal is to learn how to sift through mountains of facts and ideas to find the few nuggets of wisdom that are the most useful for understanding the world and for making decisions. This book is full of facts and numbers, but they are useful only to the extent that they lead to an understanding of key ideas, scientific laws, theories, concepts, and connections. The major goals of the study of environmental science are to find out how nature works and sustains itself (environmental wisdom) and to use principles of environmental wisdom to

help make human societies and economies more sustainable, more just, and more beneficial and enjoyable for all. As writer Sandra Carey put it, “Never mistake knowledge for wisdom. One helps you make a living; the other helps you make a life.”

To help you practice critical thinking, we have supplied questions throughout this book—at the end of each chapter, and throughout each chapter in brief boxes labeled Thinking about, and in the captions of many figures to help you analyze these visual presentations. There are no right or wrong answers to many of these questions. A good way to improve your critical thinking skills is to compare your answers with those of your classmates and to discuss how you arrived at your answers.

Know Your Own Learning Style

People have different ways of learning and it can be helpful to know your own learning style. Visual learners learn best from reading and viewing illustrations and diagrams. They can benefit from using flash cards (available on the website for this book) to memorize key terms and ideas. This is a highly visual book with many carefully selected photographs and 288 diagrams designed to illustrate important ideas, concepts, and processes.

Auditory learners learn best by listening and discussing. They might benefit from reading aloud while studying and using a tape recorder in lectures for study and review. Logical learners learn best by using concepts and logic to uncover and understand a subject rather than relying mostly on memory.

Partofwhatdeterminesyourlearningstyleishow yourbrainworks.Accordingtothe split-brainhypothesis, thelefthemisphereofyourbrainisgoodatlogic,analysis,andevaluationandtherighthalfofthebrainis goodatvisualizing,synthesizing,andcreating.Ourgoal istoprovidematerialthatstimulatesbothsidesofyour brain.

The study and critical thinking skills encouraged in this book and in most courses largely involve the left brain. However, you can improve these skills by giving your left brain a break and letting your creative side loose. You can do this by brainstorming ideas with classmates with the rule that no left-brain criticism is allowed until the session is over. The following are other techniques: working backward from where you want to be to where you are; reversing some or all of your assumptions and seeing where this leads; using analogies; visualizing the opposite of the situation; and

analyzing a problem from another person’s point of view.

When you are trying to solve a problem, rest, meditate, take a walk, exercise, or do something to shut down your controlling left-brain activity, and allow the right side of your brain to work on the problem in a less controlled and more creative manner.

This Book Presents a Positive and Realistic Environmental Vision of the Future

There are always trade-offs involved in making and implementing environmental decisions. Our challenge is to give a balanced presentation of different viewpoints, advantages and disadvantages of various technologies and proposed solutions to environmental problems, and good and bad news about environmental problems without injecting personal bias.

Studying a subject as important as environmental science and ending up with no conclusions, opinions, and beliefs means that both teacher and student have failed. However, any conclusions one does reach must be based on using critical thinking to evaluate different ideas and understand the trade-offs involved. Our goal is to present a positive vision of our environmental future based on realistic optimism.

Help Us Improve This Book

Researching and writing a book that covers and connects ideas in such a wide variety of disciplines is a challenging and exciting task. Almost every day we learn about some new connection in nature.

In a book this complex, there are bound to be some errors—some typographical mistakes that slip through and some statements that you might question, based on your knowledge and research. Our goal is to provide you with an interesting, accurate, balanced, and challenging book that furthers your understanding of this vital subject.

We invite you to contact us to point out any bias, correct any errors you find, or suggest ways to improve this book. Please e-mail your suggestions to Tyler Miller at mtg89@hotmail.com and Scott Spoolman at spoolman@tds.net

Now start your journey into this fascinating and important study of how the earth works and how we can leave the planet in a condition at least as good as what we inherited. Have fun.

Study nature, love nature, stay close to nature. It will never fail you.

Environmental Problems, Their Causes, and Sustainability

Living in an Exponential Age

Two ancient kings enjoyed playing chess. The winner claimed a prize from the loser. After one match, the winning king asked the losing king to pay him by placing one grain of wheat on the first square of the chessboard, two grains on the second square, four on the third, and so on, with the number doubling on each square until all 64 squares were filled.

The losing king, thinking he was getting off easy, agreed with delight. It was the biggest mistake he ever made. He bankrupted his kingdom because the number of grains of wheat he had promised was probably more than all the wheat that has ever been harvested!

This fictional story illustrates the concept of exponential growth, by which a quantity increases at a fixed percentage per unit of time, such as 2% per year. Exponential growth is deceptive. It starts off slowly, but after only a few doublings, it grows to enormous numbers because each doubling is more than the total of all earlier growth.

Here is another example. Fold a piece of paper in half to double its thickness. If you could continue doubling the thickness of the paper 42 times, the stack would reach from the earth to the

moon—386,400 kilometers (240,000 miles) away. If you could double it 50 times, the folded paper would almost reach the sun—149 million kilometers (93 million miles) away!

Because of exponential growth in the human population (Figure 1-1), in 2007 there were almost 6.7 billion people on the planet. Collectively, these people consume vast amounts of food, water, raw materials, and energy and in the process produce huge amounts of pollution and wastes. Unless death rates rise sharply, there will probably be 9.2 billion of us by 2050 and perhaps as many as 10billion by the end of this century (Figure 1-1).

Theexponentialrateofglobalpopulationgrowthhasdeclinedsomesince1963.Evenso,eachdayweaddanaverageof 225,000morepeopleontheearth.Thisisroughlyequivalentto addinganewU.S.cityofLosAngeles,California,every2months, anewFranceevery9months,andanewUnitedStates—the world’sthirdmostpopulouscountry—inlessthan4years.

Nooneknowshowmanypeopletheearthcan support,and atwhatlevelofresourceconsumption,withoutseriouslydegradingtheabilityoftheplanettosupportusandotherformsoflife andoureconomies.Buttherearesomedisturbingwarningsigns.

Biologistsestimatethatbytheendofthiscentury, ourexponentiallyincreasingpopulationandresourceconsumptioncouldcausetheirreversible lossofone-thirdtoone-halfoftheworld’sknown species.

Thereisgrowingevidenceandconcernthat continuedexponentialgrowthinhumanactivities suchasburningfossilfuelsandclearingforestswill changetheearth’sclimateduringthiscentury.This couldruinsomeareasforfarming,shiftwatersupplies,anddisrupteconomiesinpartsoftheworld.

Great news. We have solutions to these problems that we could implement within a few decades, as you will learn in this book.

Figure 1-1 Exponential growth: the J -shaped curve of past exponential world population growth, with projections to2100 showing possible population stabilization. (This figure is not to scale.) (Data from the World Bank and United Nations; photo of street in China by L.Yong/UNEP/Peter Arnold, Inc.)

Key Questions and Concepts*

1-1 What is an environmentally sustainable society?

CONCEPT 1-1A Our lives and economies depend on energy from the sun (solar capital ) and natural resources and natural services ( natural capital ) provided by the earth.

CONCEPT 1-1B Living sustainably means living off the earth’s natural income without depleting or degrading the natural capital that supplies it.

1-2 How can environmentally sustainable societies grow economically?

CONCEPT 1-2 Societies can become more environmentally sustainable through economic development dedicated to improving the quality of life for everyone without degrading the earth’s lifesupport systems.

1-3 How are our ecological footprints affecting the earth?

CONCEPT 1-3 As our ecological footprints grow, we are depleting and degrading more of the earth’s natural capital.

1-4 What is pollution, and what can we do about it?

CONCEPT 1-4 Preventing pollution is more effective and less costly than cleaning up pollution.

1-5 Why do we have environmental problems?

CONCEPT 1-5A Major causes of environmental problems are population growth, unsustainable resource use, poverty, excluding the environmental costs of resource use from the market prices of goods and services, and trying to manage nature with insufficient knowledge.

CONCEPT 1-5B People with different environmental worldviews often disagree about the seriousness of environmental problems and what we should do about them.

1-6 What are four scientific principles of sustainability?

CONCEPT 1-6 Nature has sustained itself for billions of years by using solar energy, biodiversity, population regulation, and nutrient cycling—lessons from nature that we can apply to our lifestyles and economies.

*This is a concept-centered book, with each major chapter section built around one to three key concepts derived from the natural or social sciences. Key questions and concepts are summarized at the beginning of each chapter. You can use this overview as a preview and as a review of the key ideas in each chapter. Supplement19 on pp. S81–S84 lists all key concepts by chapter.

Note: Supplements 3, 4, 5, and 6 can be used with this chapter.

Alone in space, alone in its life-supporting systems, powered by inconceivable energies, mediating them to us through the most delicate adjustments, wayward, unlikely, unpredictable, but nourishing, enlivening, and enriching in the largest degree—is this not a precious home for all of us? Is it not worth our love?

1-1 What Is an Environmentally Sustainable Society?

CONCEPT 1-1A Our lives and economies depend on energy from the sun ( solar capital ) and natural resources and natural services ( natural capital ) provided by the earth.

CONCEPT 1-1B Living sustainably means living off the earth’s natural income without depleting or degrading the natural capital that supplies it.

Environmental Science Is a Study of Connections in Nature

The environment is everything around us. It includes all of the living and the nonliving things (air, water, and energy) with which we interact. Despite our many

scientific and technological advances, we are utterly dependent on the environment for air, water, food, shelter, energy, and everything else we need to stay alive and healthy. As a result, we are part of and not apart from the rest of nature.

This textbook is an introduction to environmental science, an interdisciplinary study of humanity’s rela-

tionships with the earth’s living and nonliving things. It integrates information and ideas from the natural sciences, such as biology, chemistry, and geology; the social sciences, such as economics, demography (the study of populations), and political science; and the humanities, including philosophy and ethics (Figure 1-2). The goals of environmental science are to learn how nature works, how the environment affects us, how we affect the environment, and how to deal with environmental problems and live more sustainably.

Ecology, a biological science that studies the relationships between organisms, or living things, and their environment, plays an important role in environmental science. A major focus of ecology is the study of ecosystems. An ecosystem is a set of organisms interacting with one another and with their environment of nonliving matter and energy within a defined area.

We should not confuse environmental science and ecology with environmentalism, a social movement dedicated to protecting the earth’s air, water, soil, natural cleansing and recycling systems, and other components of its life-support systems for us and other species. Environmentalism is practiced more in the political arena than in the realm of science.

Sustainability Is the Central Theme of This Book

Sustainability istheabilityoftheearth’svariousnaturalsystemsandhumanculturalsystemsandeconomies tosurviveandadapttochangingenvironmentalconditionsindefinitely.Itisthecentralthemeofthisbook, anditscomponentsprovidethisbook’ssubthemes.

Letuslookmorecloselyatsustainability.Acritical componentis naturalcapital—thenaturalresources andnaturalservicesprovidedbynaturethatkeepus andotherspeciesaliveandsupportoureconomies(Figure1-3,p.8). Naturalresources arematerialsandenergyinnaturethatareessentialorusefultohumans. Theseresourcesareoftenclassifiedas renewable (such asair,water,soil,plants,andwind)or nonrenewable (suchascopper,oil,andcoal). Naturalservices are functionsofnature,suchaspurificationofairandwater,whichsupportlifeandhumaneconomies.

A critical natural service is nutrient cycling, the circulation of chemicals necessary for life from the environment (mostly soil and water) through organisms and back to the environment (Figure 1-4, p. 9). Without this service, life as we know it could not exist. Naturalcapitalissupportedby solarcapital: energyfromthesunthatwarmstheplanetandsupports photosynthesis—acomplexchemicalprocessthat plantsusetoprovidefoodforthemselvesandforusand otheranimals.Thisdirectinputofsolarenergyalsoproducesindirectformsofrenewablesolarenergysuchas wind,flowingwater,andbiofuelsmadefromplantsand

plantresidues.Thus,ourlivesandeconomiesdepend onenergyfromthesun(solarcapital)andnaturalresourcesandnaturalservices(naturalcapital)provided bytheearth(Concept1-1A).

Asecondcomponentofsustainability—andanother subthemeofthistext—istorecognizethatmanyhuman activitiescan degradenaturalcapital byusingnormally renewableresourcesfasterthannaturecanrenew them.Forexample,inpartsoftheworldweareclearing matureforestsmuchfasterthannaturecanreplenish them.Wearealsoharvestingmanyspeciesofoceanfish fasterthantheycanreplenishthemselves.

This leads us to the third component of sustainability: the scientific search for solutions to these and other environmental problems. Implementing such solutions involves using our economic and political systems. For example, scientific solutions might be to stop clearcutting biologically diverse, mature forests, and to harvest fish species no faster than they can replenish themselves. Implementing such solutions would probably require government laws and regulations.

The search for solutions often involves conflicts. Thus, another component of the shift toward sustainability involves trying to resolve these conflicts by making trade-offs, or compromises. To provide wood and paper, for example, paper companies can plant tree farms (see photo 1, p. vi) in areas that have already been cleared or degraded, in exchange for preserving mature forests.

Any shift toward environmental sustainability should be based on scientific concepts and results that are widely accepted by experts in a particular field, as

Figure 1-2 Environmental science is an interdisciplinary study of connections between the earth’s life-support system and human activities.

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was plenty of time and I took it off, adjusted it, and then put it on him again. It was all right this time.

“They wanted to get out on deck with only a few clothes on, but I pulled a heavy sweater over Mr. Guggenheim’s lifebelt, and then they both went out.

“They stayed together and I could see what they were doing. They were going from one lifeboat to another helping the women and children. Mr. Guggenheim would shout out, ‘Women first,’ and he was of great assistance to the officers.

THERE WAS GREAT EXCITEMENT.

“Things weren’t so bad at first, but when I saw Mr. Guggenheim about three-quarters of an hour after the crash there was great excitement. What surprised me was that both Mr. Guggenheim and his secretary were dressed in their evening clothes. They had deliberately taken off their sweaters, and as nearly as I can remember they wore no lifebelts at all.

“ ‘What’s that for?’ I asked.

“ ‘We’ve dressed up in our best,’ replied Mr. Guggenheim, and are prepared to go down like gentlemen.’ It was then he told me about the message to his wife and that is what I have come here for.

“Well, shortly after the last few boats were lowered and I was ordered by the deck officer to man an oar, I waved good-bye to Mr. Guggenheim, and that was the last I saw of him and his secretary.”

Taking refuge on the bridge of the ill-fated Titanic, two little children remained by the side of Captain Smith until that portion of the big ship had been swept by water. Survivors of the crew who went down with the Titanic, but were saved by clinging to an overturned lifeboat, told of their gallant commander’s effort to save the life of one of the children. He died a sailor’s death, and the little girl who had intrusted her life to his care died with him.

“He held the little girl under one arm,” said James McGann, a fireman, “as he jumped into the sea and endeavored to reach the nearest lifeboat with the child. I took the other child into my arms as I was swept from the bridge deck. When I plunged into the cold water I was compelled to release my hold on the child, and I am satisfied that the same thing happened to Captain Smith.

“I had gone to the bridge deck to assist in lowering a collapsible boat. The water was then coming over the bridge, and we were unable to launch the boat properly. It was overturned and was used as a life raft, some thirty or more of us, mostly firemen, clinging to it. Captain Smith looked as though he was trying to keep back the tears as he thought of the doomed ship.

EVERY MAN FOR HIMSELF.

“He turned to the men lowering the boat and shouted: ‘Well, boys, it’s every man for himself.’ He then took one of the children standing by him on the bridge and jumped into the sea. He endeavored to reach the overturned boat, but did not succeed. That was the last I saw of Captain Smith.”

Other graphic accounts of the final plunge of the Titanic were related by two Englishmen, survivors by the merest chance. One of them struggled for hours to hold himself afloat on an overturned collapsible lifeboat, to one end of which John B. Thayer, Jr., of Philadelphia, whose father perished, hung until rescued.

The men give their names as A. H. Barkworth, justice of the peace of East Riding, Yorkshire, England, and W. J. Mellors, of Christ Church Terrace, Chelsea, London. The latter, a young man, had started for this country with his savings to seek his fortune, and lost all but his life.

Mellors says Captain Smith, of the Titanic, did not commit suicide. The captain jumped from the bridge, Mellors declares, and he heard him say to his officers and crew: “You have done your duty, boys. Now every man for himself.”

Mellors and Barkworth, both declare there were three distinct explosions before the Titanic broke in two, and bow section first, and stern part last, settled with her human cargo into the sea.

Her four whistles kept up a deafening blast until the explosions, declare the men. The death cries from the shrill throats of the blatant steam screechers beside the smokestacks so rent the air that conversation among the passengers was possible only when one yelled into the ear of a fellow unfortunate.

“I did not know the Thayer family well,” declared Mr. Barkworth, “but I had met young Thayer, a clean-cut chap, and his father on the trip. I did not see Mr. Thayer throw his son from the ship, but the lad and I struggled in

the water for several hours endeavoring to hold afloat by grabbing to the sides and end of an overturned lifeboat.

KEPT AFLOAT BY FUR OVERCOAT.

“I consider my fur overcoat helped to keep me afloat. I had a life preserver under it, under my arms, but it would not have held me up so well out of the water but for the coat. The fur of the coat seemed not to get wet through and retained a certain amount of air that added to buoyancy. I shall never part with it.

“The testimony of J. Bruce Ismay, managing director of the White Star Line, that he had not heard explosions before the Titanic settled, indicates that he must have gotten some distance from her in his lifeboat.

“There were three distinct explosions and the ship broke in the centre. The bow settled headlong first and the stern last. I was looking toward her from the raft to which young Thayer and I had clung.

“I thought I was doomed to go down with the rest. I stood on the deck, awaiting my fate, fearing to jump from the ship. Then came a grinding noise, followed by two others, and I was hurled into the deep. Great waves engulfed me, but I was not drawn toward the ship, so that I believe there was little suction. I swam about for more than one hour before I was picked up by a boat.”

Confirming the statements made by J. Bruce Ismay, managing director of the White Star Line, before the Senatorial Investigating Committee in New York, William E. Carter, of Philadelphia, who was saved, together with his wife and two children, declared that J. Bruce Ismay had not acted like a coward but instead had aided in placing women and children in the boats and had gotten into the last one himself only after he had failed to find any more women after calling for several minutes.

Mr. Carter related his experience on the Titanic from the time the ship struck the mountain of ice until he left the ill-fated vessel on the last lifeboat a short time before she went to her doom.

UNJUST TO MR. ISMAY.

Mr. Carter declared that the statements which have been made by many persons regarding Mr. Ismay’s conduct were an injustice to him and added

that the head of the White Star Line felt extremely sad following the collision and the subsequent sinking of the world’s largest steamer.

He said that while the lifeboat containing himself and Ismay was moving away from the Titanic, Ismay rowed with two seamen and himself until they sighted the Carpathia.

One of the most interesting statements made by Mr. Carter was that a short time before he left the ship he spoke to Harry E. Widener and advised him to get into one of the boats if he could. Mr. Widener replied: “I think I’ll stick to the big ship, Billy, and take a chance.”

Relating his experiences, Mr. Carter said: “I was in the smoking room for several hours prior to the collision with Major Archie Butt, Colonel Gracie, Harry Widener, Mr. Thayer, Clarence Moore, of Washington; William Dulles and several other men.

“At exactly seventeen minutes to 12 o’clock we felt a jar and left the room to see what the trouble was outside. We were told that the ship had struck an iceberg. Many of the men were in the card room, and after learning what had happened returned to their games.

“The officers informed us that the accident was not a serious one, and there was little excitement at the time. However, I went to the lower deck, where Mrs. Carter and my two children were sleeping. I awoke my wife and told her what had occurred and advised her to dress and take the children to the deck.

“I then returned to the upper deck and found that the crew were lowering lifeboats containing women and children. When Mrs. Carter and the children came up I had them placed in one of the boats, which also contained Mrs. Astor, Mrs. Widener, Mrs. Thayer and several other women.

WATER POURING INTO THE SHIP.

“I believed at the time that they would all return to the steamer in a short time, feeling certain that there was no danger. A few minutes later, however, I learned that water was pouring into the ship and that she was in a serious condition. I saw Harry Widener and walked to where he was standing on the port side of the Titanic. An order had been given before the boats were launched to put on lifebelts, and I had adjusted one around myself.

“I said to Mr. Widener, ‘Come on, Harry, let us go to the starboard side and see if there is any chance to get in one of the boats.’ He replied, ‘I think

I’ll stick to the big ship, Billy, and take a chance.’ I left him there and went to the starboard side of A deck.

“There I saw Mr. Ismay and several officers filling the boats with women. I aided them in the work, and as the last boat was being filled we looked around for more women.

“The women that were in the boat were from the steerage with their children. I guess there were about 40 of them. Mr. Ismay and myself and several of the officers walked up and down the deck crying, ‘Are there any more women here?’We called for several minutes and got no answer.

“One of the officers then declared that if we wanted to we could get into the boat if we took the place of seamen. He gave us this preference because we were among the first-class passengers.

“Mr Ismay called again and after we got no reply we got into the lifeboat. We took the oars and rowed with the two seamen. We were about a mile away from the Titanic when she went down. It seemed to me that it was less than a half hour.

“All the women were clad in thin clothes while I was in my evening clothes, withtout a hat, and had on a pair of slippers. The night was a dark one despite the fact that the stars were out. I looked around just as the Titanic went down, being attracted by the explosions. Mr. Ismay did not turn and look but instead was very quiet, pulling on the oars.

THE CARPATHIA SIGHTED.

“I don’t know how long we were in the boat. It seemed to be several hours before we sighted the Carpathia. One of the women saw the steamer with her lights standing out in the darkness. We then started toward her. All this time I was fearing for my family, not knowing how they fared after leaving the Titanic in the lifeboat.

“We reached the side of the Carpathia before dawn and were taken aboard and given food and warmed. I do not know what became of Mr. Ismay, for I saw my wife and children and hurried toward them. I can tell you I was happy at that moment.

“On board the Carpathia we were taken care of excellently and treated fine by the officers and passengers. As we were among the first taken aboard we were given a little room. My wife and little girl slept in the bunk,

while I slept on the floor. It was a terrible experience and one I never want to go through again.

“It was my intention, if I could not get into one of the boats, to leap from the hurricane deck and swim to one of the boats.

“During the trip across I did not see any lifeboat drills, but this may have been due to the fact that the members of the crew were new to the boat and the fact that the officers thought her perfectly safe. I believe that many more could have been saved if there had been more boats.

“The men seemed to think that there was no immediate danger, and I myself did not know whether to get into the boat with Mr. Ismay or not until he said, ‘Come on, you might as well get aboard.’

“I desire to correct what has been said about him. He was perfectly cool and collected and aided a great deal in keeping the women from the steerage quiet. I will probably be called before the Senatorial investigating committee, and I can only say that Mr. Ismay only left the boat after he saw there were no more women on the deck.

“He called and so did I and we found none. I heard no shooting while I was on the Titanic, but do not know what happened after I left on the last boat.”

“Billy” Carter, his ten-year-old son, told of his experience after he was awakened by his mother and dressed.

“Mamma woke me just after it happened,” he said “and papa hurried to our rooms. While mamma and sister were dressing I got dressed as quickly as I could. She told me to be a brave boy, and we all went to the upper deck.

“All the women were on one side and the men on the other. The officers held revolvers in their hands. We were placed in one of the boats and rowed around for an awful long time until everybody began to worry and think we would not be picked up. Mamma helped to row our boat, and in the morning we sighted the big ship Carpathia and were taken on board. I felt cold, but we soon got warm and got something to eat. Then a short time later papa came on board.”

CHAPTER XV. BOY’S DESPERATE FIGHT FOR LIFE.

Plunged Into Icy Sea—Did Not See Berg—Parted From Parents—Saw Many Jump Overboard—Leaped Into Ocean—Eight Year Old Boy’s Narrative—Was “Very Quiet After He Was In Boat”—Another Lad Tells How He Saw His Uncle Die.

John B. Thayer, the seventeen-year-old son of Mrs. John B. Thayer, gave a thrilling account of the sinking of the Titanic in which his father lost his life.

Mrs. Thayer was saved in one of the lifeboats, while her son was rescued after a most exciting experience on an upturned boat, upon which he clambered after struggling on the icy water for some time.

According to Thayer’s account there was an explosion as the Titanic sank, this explosion forcing him a considerable distance and probably saving him from being drawn in by the suction as the steamer went down. His statement follows:

“Father was in bed and mother and myself were about to get into bed. There was no great shock. I was on my feet at the time, and I do not think it was enough to throw anyone down.

“I put on an overcoat and rushed up on ‘A’ deck on the port side. I saw nothing there. I then went forward to the bow to see if I could see any signs of ice. The only ice I saw was on the well deck.

“I could not see very far ahead, having just come out of a brilliantly lighted room. I then went down to our room and my father and mother came on deck with me, to the starboard side of ‘A’ deck. We could not see anything there. Father thought he saw small pieces of ice floating around, but I could not see any myself. There was no big berg.

“We walked around to the port side and the ship had then a fair list to port. We stayed there looking over the side for about five minutes. The list

seemed very slowly to be increasing. We then went down to our rooms on ‘C’ deck, all of us dressed quickly, putting on all our clothes.

“We all put on life preservers, including the maid, and over these we put our overcoats. Then we hurried up on deck and walked around, looking out at different places until the women were all ordered to collect on the port side. Father and I said good-bye to mother at the top of the stairs on ‘A’ deck on the port side and we went to the starboard side.

“As at this time we had no idea the boat would sink, we walked around ‘A’ deck and then went to ‘B’ deck. Then we thought we would go back to see if mother had gotten off safely, and went to the port side of ‘A’ deck. We met the chief of the main dining saloon and he told us that mother had not yet taken a boat and he took us to her.

FATHER LOST SIGHT OF FOREVER.

“Father and mother went ahead and I followed. They went down to ‘B’ deck, and a crowd got in front of me and I was not able to catch them, and lost sight of them. As soon as I could get through the crowd I tried to find them on ‘B’ deck, but without success. That is the last time I saw my father.

“This was about one-half hour before she sank. I then went to the starboard side, thinking that father and mother must have gotten off in a boat. All of this time I was with a fellow named Milton C. Long, of New York, whom I had just met that evening.

“On the starboard side the boats were getting away quickly. Some boats were already off in a distance. We thought of getting into one of the boats, the last boat to go on the forward part of the starboard side, but there seemed to be such a crowd around I thought it unwise to make any attempt to get into it.

“He and I stood by the davits of one of the boats that had left. I did not notice anybody that I knew, except Mr. Lindley, whom I had also just met that evening. I lost sight of him in a few minutes. Long and I then stood by the rail just a little aft of the captain’s bridge.

“The list to the port had been growing greater all the time. About this time the people began jumping from the stern.

“I thought of jumping myself, but was afraid of being stunned on hitting the water. Three times I made up my mind to jump out and slide down the

davit ropes and try to make the boats that were lying off from the ship, but each time Long got hold of me and told me to wait a while.

“He then sat down and I stood up waiting to see what would happen. Even then we thought she might possibly stay afloat.

“I got a sight on a rope between the davits and a star and noticed that she was gradually sinking. About this time she straightened up on an even keel and started to go down fairly fast at an angle of about thirty degrees.

SAYS GOOD-BYE TO EACH OTHER.

“As she started to sink we left the davits and went back and stood by the rail about even with the second funnel. Long and myself said good-bye to each other and jumped up on the rail. He put his legs over and held on a minute and asked me if I was coming.

“I told him I would be with him in a minute. He did not jump clear, but slid down the side of the ship. I never saw him again.

“About five seconds after he jumped I jumped out, feet first. I was clear of the ship, bent down, and as I came up I was pushed away from the ship by some force. I came up facing the ship, and one of the funnels seemed to be lifted off and fell towards me, about 15 yards away, with a mass of sparks and steam coming out of it.

“I saw the ship in a sort of a red glare, and it seemed to me that she broke in two just in front of the third funnel. At this time I was sucked down, and as I came up I was pushed out again and twisted around by a large wave, coming up in the midst of a great deal of small wreckage.

“As I pushed it from around my head my hand touched the cork fender of an overturned lifeboat. I looked up, saw some men on the top and asked them to give me a hand. One of them, who was a stoker, helped me up. In a short time the bottom was covered with about 25 or 30 men.

“When I got on this I was facing the ship. The stern then seemed to rise in the air and stopped at about an angle of 60 degrees. It seemed to hold there for a time and then, with a hissing sound, it shot right down out of sight with people jumping from the stern.

“The stern either pivoted around towards our boat or we were sucked towards it, and as we only had one oar we could not keep away. There did not seem to be very much suction and most of us managed to stay on the bottom of our boat.

“We were then right in the midst of fairly large wreckage, with people swimming all around us. The sea was very calm and we kept the boat pretty steady, but every now and then a wave would wash over it.

SANG A HYMN AND SAID THE LORD’S PRAYER.

“The assistant wireless operator was right next to me, holding on to me and kneeling in the water. We all sang a hymn and said the Lord’s prayer, and then waited for dawn to come.

“As often as we saw the other boats in a distance we would yell ‘Ship ahoy!’ but they could not distinguish our cries from any others so we all gave it up, thinking it useless. It was very cold and none of us were able to move around to keep warm, the water washing over her almost all the time.

“Towards dawn the wind sprang up roughing up the water and making it difficult to keep the boat balanced. The wireless man raised our hopes a great deal by telling us that the Carpathia would be up in about three hours. About three thirty or four o’clock some men on our boat on the bow sighted her mast lights.

“I could not see them as I was sitting down with a man kneeling on my leg. He finally got up and I stood up. We had the second officer, Mr. Lightholler, on board. We had an officer’s whistle and whistled for the boats in the distance to come up and take us off.

“It took about an hour and a half for the boats to draw near. Two boats came up. The first took half and the other took the balance, including myself.

“We had great difficulty about this time in balancing the boat, as the men would lean too far, but were all taken aboard the already crowded boat and in about a half or three-quarters of an hour later we were picked up by the Carpathia.

“I have noticed second officer Lightholler’s statement that ‘J. B. Thayer was on our overturned boat,’ which would give the impression that it was father, when he really meant it was I, as he only learned my name in subsequent conversation on the Carpathia and did not know I was ‘Junior.’ ”

Little Arthur Olsen, eight years old, said that America was a pretty good place, and that he was going to like it.

TOOK CARE OF HIM IN THE LIFEBOAT.

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