Field Museum of Natural History, Chicago, IL

Adler Planetarium & Astronomy Museum, Chicago, IL

The National Museum of Natural History, Washington, DC

The Carnegie Museum of Natural History and the Carnegie Science Center (including the former Buhl Planetarium), Pittsburgh, PA

Environmental links

Government agencies

The Environmental Protection Agency

The National Park Service

The U.S. Forest Service

The U.S. Fish and Wildlife Service

Environmental and conservation organizations

Greenpeace

The Nature Conservancy

The Wilderness Society

The National Parks and Conservation Association