In this Sept. 11, 2012 photo, a coal train leaves Gunnedah, Australia, 450 kilometers (280 miles) northwest of Sydney. At present, a coal train leaves or arrives in the region once every two-to-three hours, but is expected to increase to one every 19 minutes once proposed mines are in full swing. (AP Photo/Rob Griffith)

Associated Press
In this Sept. 11, 2012 photo, a coal train leaves Gunnedah, Australia, 450 kilometers (280 miles) northwest of Sydney. At present, a coal train leaves or arrives in the region once every two-to-three hours, but is expected to increase to one every 19 minutes once proposed mines are in full swing. (AP Photo/Rob Griffith)
In this Sept. 11, 2012 photo, a coal train leaves Gunnedah, Australia, 450 kilometers (280 miles) northwest of Sydney. At present, a coal train leaves or arrives in the region once every two-to-three hours, but is expected to increase to one every 19 minutes once proposed mines are in full swing. (AP Photo/Rob Griffith)
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