The Michigan attorney general sued Thursday to shut down dual oil pipelines in the Great Lakes, saying they pose an "unacceptable risk."

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Enbridge Inc. said Monday that it is moving ahead with the collection of rock and soil samples in the Straits of Mackinac while it prepares for a court battle with Michigan's governor over a planned oil-pipeline tunnel there.

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Michigan Attorney General Dana Nessel said on Wednesday she will try in June to shut down a Great Lakes oil pipeline if the governor cannot reach a resolution with the operator of the line, Enbridge, saying the state will be in "great peril" if oil continues to flow under a delicate waterway.

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The Michigan attorney general has deemed unconstitutional a 2018 law that established a panel to oversee the construction and operation of an oil pipeline tunnel beneath the channel linking lakes Huron and Michigan

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