Recent Howarth paper on methane leaks‏

Research in the USA has concluded that, over 20 years, both shale gas and conventional natural gas have a larger greenhouse gas effect than do either coal or oil. A 20-year timescale was used since this is close to the period starting now over which humanity has to drastically cut emissions to avoid dangerous climate change.

The full paper by Robert Howarth is available at http://doi.wiley.com/10.1002/ese3.35.

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