Energy Information Administration, current statistics
US Climate Change Science Program
Intergovernmental Panel on Climate Change (IPCC)
International Atomic Energy Agency
Environmental Protection Agency
American Society of Heating, Refrigeration, and Air-conditioning Engineers
Center for Renewable Energy and Sustainable Technology
American Council for an Energy-Efficient Economy
American Wind Energy Association
Danish Wind Industry Association
Worldwatch Institute - State of the World
Environmental and Energy Technologies, Lawrence Berkeley Laboratory
Education from Florida Solar Energy Center
PEW Center on Global Climate Change