Studies Suggest Bad Work, Not Fracking, Contaminates Water Near Drilling Sites

摘要

A definitive study published by the National Academy of Sciences has concluded that horizontal drilling and hydraulic fracturing to extract shale gas and oil do not, in themselves, cause contamination of drinking-water sources. However, faulty cementation and construction techniques, such as improperly cementing well casings and linings, can potentially trigger migration of methane into groundwater wells and aquifers, according to the report, published in the Sept. 12 issue of the Proceedings of the National Academy of Sciences.