04/29/2009 05:12 am ET Updated May 25, 2011

Obama Starts Climate Change Forum For Big Economies

President Barack Obama on Saturday invited 16 "major economies" including the European Union and the United Nations to take part in a forum on climate change to facilitate a U.N. pact on global warming.

Obama, a Democrat who has taken a more aggressive stance on climate change than his predecessor, Republican George W. Bush, invited the group to a preparatory session on April 27 and 28 in Washington.

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