Methane Emissions from the Natural Gas Transmission and Storage System in the United States

Environmental Science and Technology (2015, v49 n15, p9374–9383; DOI: 10.1021/acs.est.5b01669) / by Anthony J. Marchese, et al.
http://pubs.acs.org/doi/abs/10.1021/acs.est.5b01669

[New York Times] …Natural-gas gathering facilities, which collect from multiple wells, lose about 100 billion cubic feet of natural gas a year, about eight times as much as estimates used by the Environmental Protection Agency, according to the study, which appeared in the journal Environmental Science & Technology.

The newly discovered leaks, if counted in the E.P.A. inventory, would increase its entire systemwide estimate [of methane emissions] by about 25 percent, said the Environmental Defense Fund, which sponsored the research as part of methane emissions studies it organized.

“The gathering and processing sector, a piece of the supply chain that most people don’t even know exists, may be the biggest single fraction of emissions coming from natural gas,” said Mark Brownstein, who leads the Environmental Defense Fund’s work on methane emissions…

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