Summary
As low as North American natural gas prices fell in the summer of 2009, coal prices fell even further, although not low enough, it turned out, to prevent gas eating significantly into its share of the power generation market. Increasing supplies from shale gas and other unconventional sources combined with a recession-related slump in industrial gas demand to create a gas supply surplus. US coal consumption, consequently, last year fell to its lowest level in three decades.
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