Detroit’s dirty petcoke piles disappear, but where did they go?: Detroit’s Petroleum Coke Piles Facebook pageA… http://t.co/GhU4k9x7zq

by Freeman Lowell

Detroit’s dirty petcoke piles disappear, but where did they go?: Detroit’s Petroleum Coke Piles Facebook pageA… http://t.co/GhU4k9x7zq:

via Twitter http://bit.ly/17dHYQs

via tumblr http://drfreemanlowell.tumblr.com/post/60466602026

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