Climate change poses many challenges that affect society and the natural world. With these challenges, however, come opportunities to respond. By taking steps t

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

As global climate change proliferates, so too do the health risks associated with the changing world around us. Called for in the President’s Climate Action P

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

The U.S. Climate Change Science Program (CCSP) coordinates the efforts of 13 federal agencies to understand why climate is changing, to improve predictions abou