The EPA's Memo of "Endangerment Finding": http://www.epa.gov/climatechange/Downloads/endangerment/EndangermentFinding_ClimateChangeFacts.pdf http://www.epa.gov/

The EPA's Memo of "Endangerment Finding": http://www.epa.gov/climatechange/Downloads/endangerment/EndangermentFinding_ClimateChangeFacts.pdf http://www.epa.gov/climatechange/Downloads/endangerment/Enda... The National Academy of Sciences: http://www.nap.edu/openbook.php?record_id=10139&page=1 http://www.nap.edu/openbook.php?record_id=10139&page=1 The InterGovernmental Panel on Climate Change: http://www.ipcc.ch/publications_and_data/ar4/wg1/en/spmsspm-understanding-and.html http://www.ipcc.ch/publications_and_data/ar4/wg1/en/spmsspm-... ^ About as scientific as it gets, attributing global climate change trends since the beginning of the 20th century to human beings with over 90% certainty.