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Dec 8, 2014, 2:44 pm20 ptsThe Ecologist
It's the fossil fuel industry's latest stroke of genius - a coal substitute that's cheaper, dirtier and more toxic than coal itself, writes Ben Whitford. The waste product of refining heavy oil from Canada's tar sands, petcoke is stored in open mountains around Chicago's 'Slag Valley', sending plumes of sticky…
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