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FILE - This Oct. 4, 2009 file photo shows ...
AP - il y a 5 heures 59 minFILE - This Oct. 4, 2009 file photo shows Daniel Fawcett of the U.S. Forest Service setting a back-fire to combat a wildfire in Wrightwood, Calif. Since the 1997 international accord to fight global warming, climate change has worsened and accelerated, beyond some of the grimmest warnings. Officials from across the world will convene in Copenhagen next month to seek a follow-up pact, one that President Barack Obama says "has immediate operational effect...an important step forward in the effort to rally the world around a solution." (AP Photo/Francis Specker, File)