LiveScience: The Intergovernmental Panel on Climate Change's latest report on the science of global warming squarely blames humans as the primary cause of climate change, saying it is "extremely likely" that human activities have caused most of the warming of the planet's surface that has occurred since the 1950s.
The assessment, released today (Sept. 27), is the first major report from the Intergovernmental Panel on Climate Change (IPCC) since 2007, and presents the strongest case yet for human-caused global...