Intergovernmental Panel on Climate Change

Environmental News Network

Union of Concerned Scientist

Nature Conservancy

Sierra Club

CNN

Environmental Defense

World Wildlife Fund

Environmental Systems Research Institute

National Geographic Society

Programs in Environmental Studies

National Wildlife Federation

Greenpeace

Democratic National Committee

Rebublican National Committee

Green Party USA

David Suzuki Foundation

League of Conservation Voters

Student Conservation Association

Denver Post

The Population Council

World Health Organization

International Planned Parenthod Organization

Human Life International

United Nations Population Fund

North Carolina Heritage Program

Intergovernmental Panel on Climate Change (IPCC)

Rocky Mountain Institute

Office of Transportation Technologies

Earth Pulse (National Geographic Society)