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Summarizes the science of climate change and impacts on the United States, for the public and policymakers.

This Intergovernmental Panel on Climate Change Special Report is the most comprehensive assessment available on the effects of aviation on the global atmosphere

Climate change is occurring, is caused largely by human activities, and poses significant risks for-and in many cases is already affecting-a broad range of huma

In 2001 a panel representing virtually all the world's governments and climate scientists announced that they had reached a consensus: the world was warming at