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Date: 2016-08-20 04:52:43Petroleum geology Petroleum industry Oil sands James Hansen Fossil fuel Petroleum Asphalt Fuel Keystone Pipeline Athabasca oil sands | notebooks E ne r g y Dirty DistractionAdd to Reading ListSource URL: keith.seas.harvard.eduDownload Document from Source WebsiteFile Size: 523,37 KBShare Document on Facebook |