![Cory Morse FILE - In this July 6, 2017, file photo, Lauren Sargent, takes part in a protest before the Enbridge Line 5 pipeline public information session in Holt, Mich. 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. (Cory Morse/The Grand Rapids Press via AP, File)](https://mapi.associatedpress.com/v2/items/bde6189b23ee4b168d52d49b1d49858f/preview/preview.jpg?s=680x&wm=false)
FILE - In this July 6, 2017, file photo, Lauren Sargent, takes part in a protest before the Enbridge Line 5 pipeline public information session in Holt, Mich. 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. (Cory Morse/The Grand Rapids Press via AP, File)
![Dale G. Young FILE - 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, Mich. 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)](https://mapi.associatedpress.com/v2/items/5a70dc24593848feb35974cd0bc4a0f9/preview/preview.jpg?s=680x&wm=false)
FILE - 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, Mich. 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)
![Uncredited FILE - in this photo shot from a television screen provided by the Michigan Department of Environment, Great Lakes, and Energy in June 2020, shows damage to anchor support EP-17-1 on the east leg of the Enbridge Line 5 pipeline within the Straits of Mackinac in Mich. 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. (Michigan Department of Environment, Great Lakes, and Energy via AP, File)](https://mapi.associatedpress.com/v2/items/95a8ce56dcba449aaadd3a3434f90af4/preview/preview.jpg?s=680x&wm=false)
FILE - in this photo shot from a television screen provided by the Michigan Department of Environment, Great Lakes, and Energy in June 2020, shows damage to anchor support EP-17-1 on the east leg of the Enbridge Line 5 pipeline within the Straits of Mackinac in Mich. 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. (Michigan Department of Environment, Great Lakes, and Energy via AP, File)