From the current issue of Bloomberg Businessweek - I'll Show You Climate Change:
"Annual U.S. coal consumption peaked in 2007 at 1.1 billion tons and declined to 919 million tons in 2014, the least since 1992. Kentucky production topped out earlier, in 1990, at 173 million tons. The state was displaced as the nation's No. 1 producer in 1988 by Wyoming, home to the resource-rich Powder River Basin."
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