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Photo by: Andy Wong

FILE - In this July 15, 2009 file photo, U.S. Secretary of Commerce Gary Locke, center, chats with an unidentified Chinese officer as he looks at a turbine inside the China Resources Golden Concord-Co-generation Plant at the Beijing Development Area in Beijing. China has overtaken the United States as the world's largest energy consumer, the International Energy Agency said Tuesday, July 20, 2010. China immediately questioned the calculation. (AP Photo/Andy Wong, File)

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