On April 29, 2013, the Supreme Court revived an Environmental Protection Agency regulation that reinstates limits on power-plant pollution that blows across state lines.  The  decision was a defeat to electric utilities that opposed the effort as costly regulatory overreach. The 6-2 ruling breathes new life into a 2011 EPA measure known as the Cross-State Air Pollution Rule, which required 28 states to reduce emissions that hurt air quality in states located downwind.