In this Dec. 3, 2009, file photo, workers load coal into a truck outside a coal mine in Dadong, Shanxi province, China. 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)

Photo by: Andy Wong

In this Dec. 3, 2009, file photo, workers load coal into a truck outside a coal mine in Dadong, Shanxi province, China. 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)