Once booed at international climate talks, the United States won sustained applause Sunday when President Barack Obama's envoy pledged to "make up for lost time" in reaching a global agreement on climate change. ...more

March 30, 2009

The president-elect won't be there, but an Obama buzz will crackle through the conference hall when negotiators gather Monday for a final push toward a sweeping new global warming treaty. ...more

November 30, 2008

Last week the Senate failed to muster the 60 votes necessary to move forward an energy bill that would, in part, redirect tax subsidies away from oil and utility companies and channel them instead to clean, renewable energy sources such as wind and solar. ...more

December 20, 2007

In a tumultuous final session at international climate talks in which the U.S. delegates were booed and hissed, the world's nations committed Saturday to negotiating a new accord by 2009 that, in theory, would set the world on a course toward halving emissions of heat-trapping gases by 2050. ...more

December 16, 2007

He spent decades trying to get the world to listen and believe as he did that global warming would destroy the planet unless people changed their behavior, and fast. ...more

October 14, 2007