The Environmental Protection Agency can reinstate limits on power-plant pollution that blows across state lines, the Supreme Court ruled Tuesday, handing a defeat to electric utilities that opposed the effort as costly regulatory overreach. The court’s 6-2 ruling breathes new life into a 2011 EPA measure known as the Cross-State Air Pollution Rule, which requires 28 states to reduce emissions that hurt air quality in states located downwind. The regulation stands to affect about 1,000 power plants in the eastern half of the U.S. that may have to adopt new pollution controls or reduce operations. The decision could further threaten the viability of some aging coal plants, which already face other market and regulatory pressures. “There is no doubt this will add some cost pressures,” said University of Notre Dame law professor Bruce Huber. “This is an exceedingly important opinion,” he said, adding that the EPA “has been trying […]