Three pipeline projects have just halted as a result of legal challenges, protests, policies to move to clean, renewable energy, and market forces. The Dakota Access crude oil pipeline that carried shale oil from North Dakota is forced to shut down by a US District court decision against Energy Transfer LP due to an inadequate environmental impact study. This pipeline was heavily protested by Native Americans and climate groups. The controversial Keystone XL pipeline that would carry oil from Alberta, Canada sands to Nevada also suffered a legal setback with additional environmental impact reviews required. Shortly after, despite having received a favorable court ruling, Dominion Energy and Duke Energy cancelled the Atlantic Coast natural gas pipeline after cost uncertainties and delays. This pipeline would have moved natural gas from West Virginia to markets on the East coast. arstechnica