Center for Plant Conservation, Inc.
National network of 25 botanical gardens and arboreta dedicated to the conservation and study of rare and endangered U.S. plants.
The Cousteau Society
An interactive site that educates the public about natural ecosystems.
Environmental Defense Fund
Information on endangered species, rainforests and recycling.
Endangered Species Home Page, U.S. Fish and Wildlife Service
Information on the Endangered Species Act and how the U.S. Fish and Wildlife Service administers it.
International Union for Conservation of Nature and Natural Resources
IUCN works to apply sound ecosystem management to demonstrate how this is the only way to sustainable livelihoods for those directly dependent on natural resources.
National Audubon Society
A resource on how to use natural resources intelligently.
National Wildlife Federation
Works to protect nature and wildlife.
International nonprofit organization committed to persevering biological diversity by protecting natural lands and the life they harbor.
The Sierra Club
An organization that preserves and protects national parks and wilderness areas.
UNEP World Conservation Monitoring Centre
Provides information for policy and action to conserve the living world.
World Wildlife Fund
The largest private U.S. organization working worldwide to protect wildlife and wildlands — especially in the tropical forests of Latin America, Asia and Africa.