U.S. Special Envoy for Climate Change Todd Stern speaks at a news conference after attending a private meeting of the Major Economies Forum on Energy and Climate in Cuernavaca, in Mexico's state of Morelo, in this June 23, 2009 file photo. The natural gas industry looks to be a big winner in U.S. Senate legislation to tackle climate change on expectations it would lead to more gas demand and a new wave of gas-fired power plants. REUTERS/Henry Romero/Files (MEXICO POLITICS ENERGY ENVIRONMENT BUSINESS)
REUTERS/HENRY ROMERO