Carbonfund.org is making it easy and affordable for any individual, business or organization to reduce their carbon footprint through sensible energy reductions combined with cost-effective carbon offsets to eliminate their overall carbon footprint.
http://www.carbonfund.org/

Earth Share supports a nationwide network of America's leading non-profit environmental and conservation organizations, and works to promote environmental awareness and charitable giving through workplace giving campaigns. Founded by its member charities in 1988, Earth Share is an opportunity for environmentally-conscious employees and workplaces to support hundreds of environmental groups through a charitable giving drive.
http://www.earthshare.org/

Founded in 1971, Earthwatch supports scientific field research by offering volunteers the opportunity to join research teams around the world. This unique model is creating a systematic change in how the public views science and its role in environmental sustainability.
http://www.earthwatch.org/

Eco-Home™ is an on-going living research center that demonstrates ecological living in an urban environment. The Eco-Home™is a restored and retrofitted California style bungalow, circa 1911 that shows us how simple but wise property improvements can make your home warm, friendly yet environmentally sound and healthy.
http://ecohome.org/

Environmental Defense is a leading national nonprofit organization that has linked science, economics and law to create innovative, equitable and cost-effective solutions to society's most urgent environmental problems since 1967.
http://www.environmentaldefense.org/home.cfm

The mission of the Environmental Working Group (EWG) is to use the power of public information to protect public health and the environment. Founded in 1993, EWG specializes in providing useful resources to consumers while simultaneously pushing for national policy change.
http://www.ewg.org/

Founded in 1991, Save Our Wild Salmon (SOS) is a nationwide coalition of conservation organizations, commercial and sport fishing associations, businesses, river groups, and taxpayer advocates - all joined in a commitment to restore Pacific Northwest wild salmon and the communities that depend on them. Join our exciting national campaign to restore these endangered salmon and steelhead. http://www.giveadamforsalmon.org/

The National Environmental Trust is a non-profit, non-partisan organization established in 1994 to inform citizens about environmental problems and how they affect our health and quality of life.
http://www.nwf.org/

Time is running out for polar bears. Scientists warn that rising Arctic temperatures may cause nearly all of the summer sea ice that the bears depend on for survival to vanish by 2040. Polar bears are already suffering the grim effects of global warming: birth rates are falling, fewer cubs are surviving and more bears are drowning. With more than 25 percent of the world's polar bear populations already in decline, further warming could drive this beloved animal to extinction by the end of this century!
http://www.polarbearsos.org/

The Rainforest Alliance works to conserve biodiversity and ensure sustainable livelihoods by transforming land-use practices, business practices and consumer behavior.
http://www.rainforest-alliance.org/

Dedicated to providing impartial information on how global warming is affecting our planet's snowfall, ski resorts, glaciers and polar areas, as well as what the ski resorts are doing ...and what you can do.
http://www.saveoursnow.com/

WellBuilding™ is your resource for health and creating healthy environments.
http://www.wellbuilding.com/