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Proved U.S. reserves of crude oil and natural gas

Figure 2.

Proved U.S. reserves of crude oil and natural gas by December 2013 increased by 9.3% and 9.7% respectively over the previous year, driven primarily by shale and other unconventional sources. From: EIA, December 4, 2014. www.eia.gov/naturalgas/crudeoil/reserves.

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