The Heat Is On: In the U.S., Climate Change Is Here and Now and the Future

"Multiple lines of independent evidence confirm that human activities are the primary cause of the global warming of the past 50 years." -- From the overview of the National Climate Assessment The U.S. Global Change Research Program released its third National Climate Assessment today. This report is a huge and staggeringly comprehensive overview of climate change and its effects on the United States. The NCA is different from the Intergovernmental Panel on Climate Change reports; the NCA is foc...