1. Climate Change
   The Climate Change site focuses on the science and impacts of global warming or climate change, and on actions by governments, corporations, and individuals that help address global warming issues. The site also features climate change related news, events, publications, reports, presentations, and links to other sites.
   http: //epa.gov/climatechange/index.html
   
   
2. Global Beginners
   The causes of global warming...
   http: //education.arm.gov/
   
   
3. Global Warming: Focus on the Future
   http: //envirolink.org/
   
   
4. Global Warming: U.S. EPA Student Center
   The earth’s climate is predicted to change because human activities are altering the chemical composition of the atmosphere through the buildup of greenhouse gases—primarily carbon dioxide, methane, and nitrous oxide.
   http: //epa.gov/kids/
   
   
5. NOVA Online - Warnings from the Ice
   You could see what the world was like when ice sheets a thousand feet thick blanketed Canada and northern Europe...
   http: //pbs.org/wgbh/nova/warnings/
   
   
6. Ozone Depletion
   This site focuses on Ozone depletion.
   http: //library.thinkquest.org/26026/Environmental_...
   
   
7. THE PHOTOGRAPHIC DOCUMENTATION OF CLIMATE CHANGE
   Photographs related to Climate Change
   http: //worldviewofglobalwarming.org/