Five Facts That Reveal a Warming Planet (Op-Ed)

"Sixty years ago, when the Russians beat us into space, we did not deny Sputnik was up there," Obama said. Despite decades of research, too many U.S. politicians still deny climate change , a phenomenon so thoroughly documented as to find agreement among virtually every leading body of American scientists — NASA, NOAA, the National Academy of Sciences, the American Association for the Advancement of Science, the American Geophysical Union and the American Meteorological Society, just to na