18:40, 13 September 2014
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File:US natural gas by source 2014-08-06 stacked v2.png
(U.S. natural gas produce by source, 1900 to 2013, including: lower 48 states onshore conventional lower 48 states offshore tight gas Alaska coalbed methane shale gas Created Aug 6, 2014 by Mason Inman for The Frack Lab (https://www.beaconreader.com/p...)