Release of IPCC Working Group 1 (The Physical Science Basis) Fourth Assessment Report Summary for Policymakers

Working Group 1 of the Intergovernmental Panel on Climate Change (IPCC) approved the Summary for Policymakers of "Climate Change 2007: The Physical Science Basis." The report assesses the current scientific knowledge of the natural and human drivers of climate change, observed changes in climate, the ability of science to attribute changes to different causes, and projections for future climate change.

Download Summary for Policymakers:
http://www.ipcc.ch/SPM2feb07.pdf

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