EPA: Watersheds
http://www.epa.gov/owow/watershed/
EPA: Wetlands
http://www.epa.gov/owow/wetlands/
U.S. Fish and Wildlife Service: National Wetlands Inventory
http://www.fws.gov/nwi/
Consumers Guide to Energy Efficiency and Renewable Energy
http://www.eere.energy.gov/consumer/
EIA Official Energy Statistic from the U.S. Government
http://www.eia.doe.gov/
Energy Quest
http://www.energyquest.ca.gov/index.html
National Renewable Energy Laboratory
http://www.nrel.gov/
Recycle City
http://www.epa.gov/recyclecity/
AAAS Atlas of Population and Environment
http://atlas.aaas.org/
Biodiversity and Conservation
http://darwin.bio.uci.edu/~sustain/bio65/Titlpage.htm
Biodiversity and Human Health
http://www.ecology.org/biod/
Understanding Biodiversity
http://www.nysm.nysed.gov/bri/biodiv.html
Tipping the Scale: The Delicate Balance Between Microbes and Man
http://sciencebulletins.amnh.org/biobulletin/biobulletin/story996.html
4-H Virtual Farm
http://www.ext.vt.edu/resources/4h/virtualfarm/main.html
Agriculture in the Classroom
http://www.agclassroom.org/
United States Department of Agriculture
http://www.usda.gov/wps/portal/usdahome
Pennsylvania Integrated Pest Management Program
http://paipm.cas.psu.edu/
Ecosystems of Our World
http://library.thinkquest.org/11353/ecosystems.htm
Defenders of Wildlife
http://www.defenders.org/about/
Endangered!
http://www.amnh.org/nationalcenter/Endangered/index.html
Endangered Species Program: U.S. Fish & Wildlife Service
http://www.fws.gov/endangered/
International Wildlife Coalition
http://www.iwc.org/
National Wildlife Federation
http://www.nwf.org/
World Wildlife Fund
http://www.worldwildlife.org/
Earthwatch Institute
http://www.earthwatch.org/site/pp.asp?c=8nJELMNkGiF&b=1322375