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A sticking point for climate diplomacy /  Michael Levi, Energy, security and climate, 14/10/2013http://blogs.cfr.org/levi/2013/10/14/a-sticking-point-for-climate-diplomacy/President Obama’s big climate change speech in late June has spurred a lot of optimistic talk about the possibility of concluding an international deal in 2015, the deadline set last year for a new climate agreement. By pursuing new regulations under existing authority, the United States could deliver on its Copenhagen promise of cutting its emissions to 17 percent below 2005 levels by 2020, presumably strengthening its bargaining hand...