EPA Declares Greenhouse Gases a Threat to Humans

The

endangerment finding, as the ruling is known, comes two years after the U.S. Supreme Court ruled that greenhouse gases were a pollutant as defined by the Clean Air Act, and therefore fall under EPA’s jurisdiction. EPA proposed the endangerment finding in April 2009 and, after a 60-day public comment period, sorted through and responded to over 380,000 comments before releasing the final ruling.