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The Climate Change Limits of U.S. Natural Gas / Michael Levi, Energy, security and climate, August 20, 2012http://blogs.cfr.org/levi/2012/08/20/the-climate-change-limits-of-u-s-natural-gasThe Associated Press reported last week that U.S. greenhouse gas emissions have dropped to a twenty-year low on the back of abundant natural gas. “The question,” it correctly observed, “is whether the shift is just one bright spot in a big, gloomy [climate change] picture, or a potentially larger trend”...