The U.S. Court of Appeals for the Third Circuit upheld an Environmental Protection Agency decision to limit sulfur dioxide emissions from the coal-fired Portland Generating Station in Pennsylvania, saying the agency had the authority under the Clean Air Act to act. New Jersey, a downwind state, requested the agency to intervene because the plant was preventing the state from meeting national ambient air quality standards; the agency issued a final rule to restrict emissions from the plant. The plant owner, GenOn, recently announced it will shut down the plant in 2014.