Mountain of Petroleum Coke From Oil Sands Rises in Detroit - NYTimes.com

And, what happens to it? What about secondary waste effects?

http://www.nytimes.com/2013/05/18/business/energy-environment/mountain-of-petroleum-coke-from-oil-sands-rises-in-detroit.html?nl=todaysheadlines&emc=edit_th_20130518

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