eNature.com
America's Wildlife Resource, provided by the National Wildlife Federation.
http://www.enature.com

WWF Global Network
Provides links to WWF national organizations, program offices, and associate offices.
http://www.wwf.org/

Greenpeace International
Greenpeace is the world's most effective environmental activist group dedicated to the issues of climate change, saving our ancient forests, stopping pollution, ending the nuclear threat...
http://www.greenpeace.org/international/

The Ecology Global Network
Nexus of the World Wide Web, television, radio and personal data systems regarding all facets of ecology and the environment…
http://www.ecology.com