There is no scientific consensus that human activity is the cause of global warming

[Warning: the above title contains extreme sarcasm]

Unless of course you take into account the accumulated consensus of the Intergovernmental Panel on Climate Change; the U.S. Global Change Research Program; the Arctic Climate Impact Assessment; the European Academy of Sciences and Arts; the InterAcademy Council; the national science academies of Australia, Belgium, Brazil, Cameroon, Canada, China, France, Ghana, Germany, Indonesia, Ireland, Italy, India, Japan, Kenya, Madagascar, Malaysia, Mexico, Nigeria, New Zealand, Russia, Senegal, South Africa, Sudan, Sweden, Tanzania, Uganda, the United Kingdom, the United States, Zambia, and Zimbabwe; the Network of African Science Academies; the Royal Society of New Zealand; the American Association for the Advancement of Science; the European Science Foundation; the National Research Council; the American Society for Microbiology; the Australian Coral Reef Society; the Institute of Biology; the Wildlife Society; the American Geophysical Union; the European Federation of Geologists; the European Geosciences Union; the Geological Society of America; the International Union of Geodesy and Geophysics; the National Association of Geoscience Teachers; the Stratigraphy Commission of the Geological Society of London; the American Meteorological Society; the Australian Meteorological and Oceanographic Society; the Canadian Foundation for Climate and Atmospheric Sciences; the Canadian Meteorological and Oceanographic Society; the Royal Meteorological Society; the World Meteorological Organization; the American Quaternary Association; the International Union for Quaternary Research; the American Astronomical Society; the American Statistical Association; and the American Association of Petroleum Geologists.

Other than these and other scientific bodies, there's no consensus. For instance, the scientific organizations that officially refute this claim include... um... er... Do these assholes count?

-Kudos to whoever did all the real research for the original Wikipedia article.

-And as a bonus, here's some work the Center For Inquiry has done in debunking Senator James Inhofe's (R-OK) "list" of dissenting scientists with regards to human involvement in global warming.