Environment activists rally in front of the White House to call on the Obama administration to step up its efforts on climate change.
Environment activists rally in front of the White House to call on the Obama administration to step up its efforts on climate change. Olivier Douliery/Abaca Press/MCT
Environment activists rally in front of the White House to call on the Obama administration to step up its efforts on climate change. Olivier Douliery/Abaca Press/MCT

U.S. action on climate policy is key to international treaty

December 04, 2009 5:56 PM

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