THE FUTURE OF PLANET EARTH: A Changing Biosphere - Humans and Global Stewardship An illustrated talk by G. Warfield “Skip” Hobbs Geologist and Conservationist
Since its creation 4.5 billion years ago, the earth has experienced constant change. Geologic change, however, takes time – usually tens of thousands of years, if not hundreds of thousands or millions of years. Human civilization has made, and continues to make, profound changes to the earth, both to the benefit and the detriment of mankind and all other inhabitants of earth’s biosphere. This now includes changes to the chemistry and physical state of the atmosphere and oceans. Life forms have adapted to geological change through natural evolution, or have become extinct. With the exception of several cataclysmic events, the rate of global change occurring today has not previously occurred in geologic history. As the global population surges past the 7 billion mark and more and more people enter the “consumer age”, natural resource extraction, energy supply, food and water are being stretched to the limits of sustainability. What will the future bring? Distinguished geologist Skip Hobbs will discuss how the earth’s biosphere is transforming; the importance of sustainability in natural resource extraction; climate change and the human factor; and what we can and must do as responsible citizens to deal with and mitigate these changes. The 45 minute talk is illustrated with some very dramatic PowerPoint images and supporting scientific data.