Not according to a study prepared by the American Petroleum Institute (API) and the America's Natural Gas Alliance (ANGA). From the related press release: "API’s Director of Regulatory and Scientific Affairs Howard Feldman told reporters this morning that a URS study prepared for API and the American Natural Gas Association showed that methane emissions from natural gas production were half what had been previously estimated by EPA. He called the new data the most robust the nation now has on this important subject." For a copy of the study, see here.