Dominion Energy and Duke Energy have canceled their Atlantic Coast Pipeline project, a natural gas pipeline that was to stretch hundreds of miles across West Virginia, Virginia and North Carolina and cross part of the Appalachian Trail. Despite a recent win in the U.S. Supreme Court over a U.S. Forest Service permit, the companies said legal costs, mainly from environmentalists’ lawsuits seeking to block the pipeline, had increased costs to as much as $8 billion from the $5 billion when the project was launched.