EPA Calls CO2 a Danger — At Last

Time/Health & Science: By Bryan Walsh Monday, Mar. 23, 2009

It's been two years since the U.N. Intergovernmental Panel on Climate Change laid out the definitive case that human beings were causing global warming, and two decades since NASA scientist James Hansen first told Congress of the threat of rising CO2 emissions. So, why has it taken this long for the Environmental Protection Agency (EPA) to announce that greenhouse gases endanger human health? Change can be slow in Washington.