Environmentalists challenge approval of pipeline tunnel project
Credit: In this June 8, 2017, file photo, fresh nuts, bolts and fittings are ready to be added to the east leg of the pipeline near St. Ignace, Mich., as Enbridge prepares to test the east and west sides of the Line 5 pipeline under the Straits of Mackinac in Mackinaw City, Michigan. Environmentalists are challenging Michigan regulators' decision to approve encasing part of an aging Enbridge Energy oil pipeline that runs beneath a channel connecting two Great Lakes, arguing that they failed to properly consider alternatives that would minimize climate impacts. (Dale G Young/Detroit News via AP, File)
