More climate science, taken from www.climateprogress.org

This is taken from this Climate Progress blog entry:  http://bit.ly/FSFZA.  I have already made one post on the science behind climate change, and really wanted to do another that's this condensed. Since Dr. Joe Romm has gotten me started, I'll add all the others I have soon.  This will do to be getting on with.
American Association for the Advancement of Science: The scientific evidence is clear: global climate change caused by human activities is occurring now, and it is a growing threat to society. [10/9/06]

U.S. Global Change Research Program: Global temperature has increased over the past 50 years. This observed increase is due primarily to human-induced emissions of heat-trapping gases. [June 2009]

American Physical Society: Emissions of greenhouse gases from human activities are changing the atmosphere in ways that affect the Earth’s climate. Greenhouse gases include carbon dioxide as well as methane, nitrous oxide and other gases. They are emitted from fossil fuel combustion and a range of industrial and agricultural processes. The evidence is incontrovertible: Global warming is occurring. If no mitigating actions are taken, significant disruptions in the Earth’s physical and ecological systems, social systems, security and human health are likely to occur. We must reduce emissions of greenhouse gases beginning now. [11/18/07]

American Meteorological Society: Despite the uncertainties noted above, there is adequate evidence from observations and interpretations of climate simulations to conclude that the atmosphere, ocean, and land surface are warming; that humans have significantly contributed to this change; and that further climate change will continue to have important impacts on human societies, on economies, on ecosystems, and on wildlife through the 21st century and beyond. [2/1/07]

American Geophysical Union: The Earth’s climate is now clearly out of balance and is warming. Many components of the climate system—including the temperatures of the atmosphere, land and ocean, the extent of sea ice and mountain glaciers, the sea level, the distribution of precipitation, and the length of seasons—are now changing at rates and in patterns that are not natural and are best explained by the increased atmospheric abundances of greenhouse gases and aerosols generated by human activity during the 20th century. . . . Evidence from most oceans and all continents except Antarctica shows warming attributable to human activities. [December 2007]

American Quaternary Association: Few credible scientists now doubt that humans have influenced the documented rise in global temperatures since the Industrial Revolution. [10/24/06]

The national science academies of Canada, France, Germany, Italy, Japan, Russia, the United Kingdom, the United States, Brazil, China, India, Mexico and South Africa: It is essential that world leaders agree on the emission reductions needed to combat negative consequences of anthropogenic climate change at the UNFCCC negotiations in Copenhagen in December 2009. [May 2009]