About the ozone layer, from USEPA's Sunwise Program for Schools.
For more information on global warming see the EPA’s webpage: http://www.epa.gov/globalwarming.

Burlington's efforts to combat climate change and greenhouse gas production: See the Climate Protection Task Force page.

10% Challenge from the Alliance for Climate Action. Raising awareness about climate change and reducing Burlington's greenhouse gas emission.

More information on global climate change.

About climate change, from Scripps Insitute of Oceanography, at UCSD.