FILE – This Feb. 8, 2018, file photo shows signs that mark the route of the Atlantic Coast Pipeline in Deerfield, Va. The U.S. Supreme Court is set to wade into a long-running battle between developers of the 605-mile natural gas pipeline and environmental groups who oppose the pipeline crossing the storied Appalachian Trail. On Monday, Feb. 24, 2020, the high court will hear arguments on a critical permit needed by developers of the Atlantic Coast Pipeline. (AP Photo/Steve Helber)