The coal-fired Castle Gate Power Plant is pictured outside Helper, Utah November 27, 2012. The plant was closed in the Spring of 2015 in anticipation of new EPA regulations. President Barack Obama will unveil on August 3, 2015 the final version of his plan to tackle greenhouse gases from coal-fired power plants, kicking off what is expected to be a tumultuous legal battle between federal environmental regulators and coal industry supporters. REUTERS/George Frey