Climate science

Global Warming Has Begun, Expert Tells Senate, New York Times, June 24, 1988: On June 23, 1988, NASA scientist Dr. James E. Hansen testified before the U.S. Senate, stating he was “99 percent certain that human-induced global warming had begun.”…

The fact that the climate has warmed is hard for humans to actually experience first hand, and we certainly can’t see carbon in the air with our own eyes. For most of us, climate change manifests itself and affects our…