IHS: Greenhouse-gas emissions from shales overstated by EPA

摘要

Estimates used by the U.S. Environmental Protection Agency (EPA) and others for greenhouse-gas emissions from upstream shale-gas production are likely significantly overstated, according to a new report by IHS Cambridge Energy Research Associates (IHS CERA). The estimates are based on assumptions that do not reflect current industry practice and should be reevaluated, it says. "Methane emissions have become a very important and controversial issue given their potency as a greenhouse gas," says Mary Barcella, IHS CERA director of North American natural gas.