http://online.wsj.com/article/SB10001424052702303342104579100593218822558.htmlA United Nations report on climate change said that while human activity has been the dominant cause of global warming since the 1950s, temperatures aren't expected to rise as quickly as previously thought.
A summary of the report, issued by the Intergovernmental Panel on Climate Change, took an even firmer stance on human influence than the previous report issued in 2007. The new report says there is an "unequivocal" warming of the climate and that it is "extremely likely" that humans are the biggest influence, whereas six years ago the group said it was "very likely" due to human activity.
The report concluded that there is a 95% chance that humans can be primarily blamed. The panel, however, dialed back its projections on how much of an increase in temperature the earth is likely to see by the end of the 21st century.