In This Issue:
On February 2, 2007, the Intergovernmental Panel on Climate Change (IPCC) released a summary of the current science of climate change. The summary, directed at policymakers, is based on six years of review of scientific literature by experts from around the world, convened under the auspices of the IPCC's Working Group I. The report calls the evidence of climate warming "unequivocal." The report finds that rates of both observed warming and sea level rise have accelerated over the past century, and discusses other important changes being observed, including more intense precipitation in some regions, prolonged droughts in others, and intensification of hurricanes in some tropical regions.
Pew Center's summary of the report  (93 KB pdf).