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Information on the United Nations Summit on Climate Change on September 22, 2009 is presented. It features two of the largest emitters of greenhouse gases in the world, the U.S. and China, where each country presidents voiced support on a new climate-change treaty. President Hu Jintao of China pledged that they will cut their carbon dioxide intensity by 2020. Moreover, U.S. President Barack Obama reaffirmed their commitment to tackle climate change in the Copenhagen talks in December 2009.

The article offers information on upcoming congresses related to climate change which include the Summit on Climate Change to be held on September 22, 2009 at the United Nations headquarters in New York City and the Group of 20 (G-20) meeting to be held on September 24-25 in Pittsburgh, Pennsylvania.