Reuters: The U.S. needs to make deeper cuts in greenhouse gas emissions than President Barack Obama has proposed if the world stands a chance of avoiding devastating climate change, a European Union official said on Friday. Jos Delbeke, the European Commission’s deputy director-general of the environment, said a goal of bringing U.S. greenhouse gas emissions back to 1990 levels by 2020, set by Obama last month, will likely not be enough. “I doubt whether that will bring us to the …