"Some of the most substantial upward revisions involved emissions from natural-gas and petroleum systems across the country—an emissions source that has increasingly been targeted by environmentalists, who say that the boom in domestic oil and gas production has driven greater methane emissions," Mooney writes. "According to the agency, the average increase per year due to its revisions was 12.9 million metric tons of carbon dioxide equivalents for natural gas systems (now the largest category of methane emissions), and 20.7 million metric tons for petroleum systems."
The American Petroleum Institute, a major industry group, disputed the numbers, Mooney writes. Kyle Isakower, the group’s vice president of regulatory and economic policy, told Mooney, “They’ve made a significant modification to the inventory estimates, and we believe that it is seriously flawed." (Read more)