U.S. sets pollution limits for new power plants WASHINGTON (Reuters) - The U.S. Environmental Protection Agency on Friday announced carbon pollution standards that will apply to new power plants built in the United States. Under the proposal, new large natural gas-fired turbines would need to meet a limit of 1,000 pounds of carbon dioxide per megawatt hour, while new small natural gas-fired turbines would need to meet a limit of 1,100 pounds of CO2 per megawatt hour. New coal-fired units would need to meet a limit of 1,100 pounds of CO2 per megawatt hour but would be given "operational flexibility" to achieve those levels, the agency said. Reporting by Valerie Volcovici, writing by Ros Krasny; Editing by Gerald E. McCormick