The Consensus on Climate

The Intergovernmental Panel on Climate Change has weighed in with an assessment to which 113 nations contributed. The resulting document says it is "very likely" (at least 90 percent certain) that climate change is caused by use of fossil fuels. The resulting temperature increases is estimated at 2.5 to 10.4 F by the year 2100. Ker Than, writing for LiveScience.com, adds context to the debate, documenting information both sort-of-comforting (other events have changed the Earth’s climate much more than anthropogenic global warming) and very discomfiting (the Earth will carry on pretty much without even noticing what happens to a few billion smart primates over the upcoming centuries).
http://www.livescience.com/environment/070201_gw_life.html