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People walk past a sand sculpture made by activists of Oxfam, a group of non-governmental organizations, during the United Nations Climate Change Conference in Cancun, Mexico, Friday, Dec. 10, 2010. (AP Photo/Israel Leal)

People walk past a sand sculpture made by activists of Oxfam, a group of non-governmental organizations, during the United Nations Climate Change Conference in Cancun, Mexico, Friday, Dec. 10, 2010. (AP Photo/Israel Leal)

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