Fracking Acquitted of Contaminating Groundwater

摘要

A major review of fracking-the contro versial practice of pumping fluids into tight shale formations to release natural gas uncovered no direct evidence that it is con taminating groundwater. The review, released at the meeting, suggests that problems that have been attributed to fracking tend to occur closer to the surface, when gas and drill ing fluid escape from poorly lined wells or storage ponds. Charles Groat, a former direc tor of the U.S.