Reuters: U.S.-run talks on strategies for major nations to fight climate change may stop short of setting firm new targets and dates, such as 2050 goals for greenhouse gas emissions, Washington’s top climate envoy said on Thursday. Todd Stern said Washington wanted major economies including China, the European Union and Russia to seek more common ground on issues such as green technology, finance and emissions cuts at talks in Paris on May 25-26. The talks are the second among major …