Environmental Advisory Council

Why it's a problem and what we can do about it.

Most of us are familiar with air, water, and land pollution, but did you know that light can also be a pollutant? Since Thomas Edison's patent of the tungsten lightbulb in 1906, artificial electric lighting has transformed our lives. But in the process, we have lost an important part of our human heritage: the night sky. Less than 100 years ago, most everyone could look up and see a spectacular starry night sky. Today 80% of Americans cannot see the Milky Way from their home. Over the last century, the increased or excessive and widespread use of artificial light at night has not only impaired our view of the universe but has adversely affected; the Earth's climate through human energy consumption. Light pollution is a major contributor to the climate crisis. Large amounts of electricity are needed to generate light, and electricity is often produced by burning fossil fuels. Uncontrolled outdoor lighting wastes energy. As much as 50% of outdoor lighting is wasted, increasing greenhouse gas emissions, and contributing to climate change. Plants and animals depend on the daily cycle of light and dark to regulate reproduction, nourishment, sleep, and protection from predators. Scientific research has linked light pollution to negative and deadly outcomes for many creatures including amphibians, birds, mammals, insects, and plants. For example, some nocturnal birds use the moon and stars for navigation during their migrations; and they can become disoriented when flying through brightly lit areas. Female sea turtles shy away from areas with bright lights, which interrupts their nesting patterns. Newly hatched turtles are so drawn to lights, so instead of heading to the ocean, they often end up on land instead.

Research suggests that artificial light at night can negatively affect human health as well, increasing risks for obesity, depression, sleep disorders, diabetes, and breast cancer. Scientists have also established a link between light pollution and air pollution. Light from our cities can destroy nitrate radicals that form at night that help to cleanse the air. In addition to the negative economic, environmental and health impacts associated with light pollution, we are losing a precious natural resource: our nighttime environment. Outdoor lighting illuminates the sky, hiding the stars and changing how we experience the night. Despite a century of uncontrolled outdoor lighting, there are ways to combat light pollution that will make a difference right away. The West Chester Green Team is addressing the problem of light pollution by creating a local Dark Sky Initiative. If you would like to learn more about the West Chester Dark Sky Initiative, please contact Marc Gagné at mgagne@wcupa.edu.

Here are 7 steps you can take to get started for protecting the night.

Become an IDA member at 1. https://darksky.salsalabs.org/ new_member_pmt_form/+in dex.html

Assess the lighting around 2. your residence. Take a few moments to inspect your property for inefficient, 3.

4.

5.

6.

7. poorly installed, and unnecessary outdoor lighting. Look for the International Dark-Sky Association (IDA) Fixture Seal Of Approval on any outdoor lighting you purchase. IDA maintains a searchable database of lighting products certified to minimize glare, light trespass, and skyglow. Talk to your friends, family & neighbors—be a powerful dark sky advocate. Spread the word online—Engage your online community about the issues. Be part of a global community that is helping scientists measure and study light pollution. Join IDA's advocate network https://docs.google.com/for ms/d/e/1FAIpQLSd5pRfH62M yzn1ucmzE0fsJpPetgLhIiynEzMtBM6iFxNgcQ/viewform

Dark Sky: https://www.darksky.org/ To get involved: https://www.darksky.org/get-involved/

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