U.K. Says Shale Gas Fields Twice Size of Previous Estimates

U.K. Says Shale Gas Fields Twice Size of Previous Estimates

Paul Thomas/Bloomberg

An employee holds a segment of Bowland Shale, from which shale gas can be extracted, in this arranged photograph at Cuadrilla Resources Ltd.'s shale gas exploration site in Singleton, U.K., on July 12, 2011.