Detroit refinery expansion adds more Canadian crude, brings more worries

By Jim Morris and Chris Hamby

A conflict in Detroit symbolizes a larger national debate over oil company plans to step up refining of heavier, dirtier crude from Alberta.

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Excerpts from this story referencing "Marathon Petroleum":

"… arted smelling it on Thursday,” said Shaw, who immediately suspected the Marathon Petroleum Co. refinery a half-mile from her house. “I kept the windows closed beca …"