Michael Levi's blog post about the details of the methane leakage data gathered by NOAA scientists in Colorado is interesting. Levi gets into the weeds of some of the calculations used in the paper. See
No matter the details, my bottom line remains that methane leakage rates can and should be cut. Doing so is crucial to maximizing the benefits of natural gas and protecting the natural gas "brand." Both industry and environmentalists should have common purpose on cutting methane leakage. The EPA July 2011 proposed rule that is now expected to be made final in April will be a major milestone on this important issue.