Government of Brazil:Ministry of the Environment
U.S. Department of State:Papua New Guinea fact sheet
U.S. Geological Service:Lake Chad
NASA: The Amazon
U.N. World Water Assessment Program
United Nations: State of the world's forests
China's National Development and Reform Commission
Cooperative Institute for Research in Environmental Sciences
U.S. Department of State:Madagascar
U.S. Department of State: China fact sheet
NASA: Arctic resources
Biodiversity Hotspots: Madagascar
Cambodian Wildlife Rescue
Alaska Science Center on Sea Ice
National Park Service: Yellowstone Park
World Conservation Union program in Thailand
U.S. Fish and Wildlife Service:Polar bear facts
U.S. Fish and Wildlife Service:Gray wolves
