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"A new study adds to growing evidence that the risk of fracking contaminating drinking water wells is to due to problems with the lining of the gas wells, not the high-pressure fracturing of deep shale to release natural gas. In a new study, scientists examined isotopes of helium and two other noble gases to identify the source of methane found in drinking water wells in the Marcellus Shale of Pennsylvania and the Barnett Shale of Texas, areas where a lot of fracking has taken place. The pattern of isotopes suggested that the stray gas had leaked out of the well casing near the surface, rather than escaping from the fracked deep shale, according to a story in The Dallas Morning News. The findings will be published online this week in the Proceedings of the National Academy of Sciences."
Tags: energy, pollution, resources, environment, environment modify, ecology.
