Jim Hansen, left, a leading researcher on global warming, talks with House Select Energy Independence and Global Warming Committee Chairman Rep. Edward Markey, D-Mass., right, prior to a briefing on global warming on Capitol Hill in Washington, Monday, June 23, 2008. (AP Photo/Susan Walsh)
AP - Exactly 20 years after warning America about global warming, a top NASA scientist said the situation has gotten so bad that the world's only hope is drastic action. |