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Map attribution: "EIA World Shale Gas Map" by Energy Information Administration - http://www.eia.gov/analysis/studies/worldshalegas/ the report from 2011: http://www.eia.gov/analysis/studies/worldshalegas/archive/2011/pdf/fullr.... Licensed under Public Domain via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:EIA_World_Shale_Gas_Map.png#media...

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http://www.eurasiareview.com/04022015-shale-industry-development-potenti...
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http://www.theguardian.com/sustainable-business/2015/feb/02/images-clima...
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http://onlinelibrary.wiley.com/store/10.1111/hypa.12063/asset/hypa12063....