FILE – In this Jan. 8, 2019, file photo, protesters hold signs as they turn their backs on a meeting of the Virginia State Air Quality Control Board in Richmond, Va. The U.S. Supreme Court is set to wade into a long-running battle between developers of a 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, File)