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Methane Emissions from Unconventional Oil and Gas

Science

Sources of methane within the United States include all sources important on a global basis, but with larger fractions coming from anthropogenic activities.[1] The oil and gas industries and animal agriculture are estimated to be the two largest sources within the U.S., each accounting for approximately 25% of total emissions.[2] Wetlands, landfills, and coal mines are estimated to account for 23%, 15%, and 7% of emissions, respectively.[3] While significant uncertainty exists concerning the total U.S. emissions from each of these sources,[4] there exists confidence that cumulatively, anthropogenic activities represent a large fraction of U.S. emissions, and that each of these sources represents a significant contribution to U.S. emissions.[5]

 

 

[1] Greenhouse Gas Reporting Program 2015, Epa, https://www.epa.gov/ghgreporting/ghg-reporting-program-data-sets (last visited Nov. 3, 2017).

[2] J.D. Maasakkers et al., Gridded National Inventory of U.S. Methane Emissions, 50 Environ. Sci. Technol. 13123 (2016), 10.1021/acs.est.6b02878.

[3] Id.

[4] A. R. Brandt et. al., Methane Leaks from North American Natural Gas Systems, 343 Sci. 733 (2014), 10.1126/science.1247045; S. M. Miller et al., Anthropogenic Emissions of Methane in the United States, 110 (50) Proc. Natl. Acad. Sci.  20,018 (2013), doi:10.1073/pnas.1314392110; A. J. Turner et al., A Large Increase in U.S. Methane Emissions over the Past Decade Inferred from Satellite Data and Surface Observations, 43 Geophys. Res. Lett. 2218 (2016), doi:10.1002/2016GL067987; L.M. Bruhwiler et al., U.S. CH4 Emissions from Oil and Gas Production: Have Recent Large Increases Been Detected? 122 J. Geophys. Res. Atmos. 4070 (2017), doi:10.1002/2016JD026157.

[5] A. J. Turner et al., A Large Increase in U.S. Methane Emissions over the Past Decade Inferred from Satellite Data and Surface Observations, 43 Geophys. Res. Lett. 2218 (2016), doi:10.1002/2016GL067987


For more information, please contact the Guide Author, Ekrem Korkut, Research Assistant at The Center for Agricultural and Shale Law.  

Email: EZK137@psu.edu


The Center for Agricultural and Shale Law

Penn State Law

The Pennsylvania State University

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University Park, PA 16803

Phone: (814) 865-4290

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