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In Chicago, piles of petroleum coke suggest the future of Canadian tar sands oil

Nov 18, 2013
A byproduct of refining gasoline clouds the skies of a South Side Chicago neighborhood.

New USDA Label Steers Consumers toward Renewables

Jan 21, 2011
While Congress continues to lag on passing a renewable energy standard, the US Department of Agriculture has a new plan to help consumers move aw...