The '''anthropogenic global warming theory''' holds human beings responsible for most of the slight [[warming trend]] seen since the [[Little Ice Age]] - at about the time of the [[American Revolutionary War]]. [http://www.sitewave.net/news/s49p1834.htm] (''Anthropo-'' refers to men, ''genic'' means [[cause and effect|cause]].)
A panel of the [[United Nations]] is "90% sure" that most [[global warming]] since about 1950 has been caused by human beings,.<ref>[http://physicsworld.com/cws/article/news/26979 Mankind to blame for global warming, says IPCC]</ref> but But Roger Pielke, [[Professor]] of Environmental Studies at the [[University of Colorado]], said, "After [[Climategate]], the surface temperature record is being called into question." To experts such as McIntyre and Pielke, perhaps the most baffling thing has been the near-unanimity over [[global warming]] in the world’s [[mainstream media]] - a unanimity much greater than that found among scientists are skeptical about this view.{{fact}}<ref>David Rose. [http://www.dailymail.co.uk/news/article-1235395/SPECIAL-INVESTIGATION-Climate-change-emails-row-deepens--Russians-admit-DID-send-them.html SPECIAL INVESTIGATION: Climate change emails row deepens as Russians admit they DID come from their Siberian server], [[UK]] ''Mail Online'', December 13, 2009.</ref>
The idea that human activities, such as the combustion of [[fossil fuels]], can significantly warm the earth's atmosphere is called the enhanced [[greenhouse effect]].<ref>[http://zebu.uoregon.edu/1998/es202/l13.html Global Warming]</ref>
==See Also==
*[[Climate crisis]]
*[[Global warming controversy]]
[[Category:Earth Sciences]]
[[category:ecology]]