** FILE ** In this Nov. 30, 2007, file photo, backdrop by cooling towers of a power plant and chemical factory, miners shovel coal at a mine in Xiahuayuan county, north China's Hebei province. (AP Photo/Oded Balilty, File)
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** FILE ** In this Nov. 30, 2007, file photo, backdrop by cooling towers of a power plant and chemical factory, miners shovel coal at a mine in Xiahuayuan county, north China's Hebei province. (AP Photo/Oded Balilty, File)
