Prior posts have noted groundwater contamination associated with natural gas produced from deep shale deposits by hydraulic fracturing. A study by researchers (with no industry contributions) concludes that such pollution results not from liquids pumped down to the shale deposits to fracture the deep rock, but instead results from poor management of wastes or bore wells thousands of feet above the shale. The study does not minimize drinking-water pollution associated with shale-gas production, but concludes that the risks are similar, if not exactly the same, as the impacts that are seen from conventional gas development.
The symposium presenting the study can be found at: http://aaas.confex.com/aaas/2012/webprogram/Session5373.html.
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