.@IHS: By 2035, unconventional #shale activity is expected t aspwv2013-06-26T00:00:00-04:00June 26th, 2013|Twitter| .@IHS: By 2035, unconventional #shale activity is expected to have generated nearly $2.5 trillion in cumulative govt. revenues since 2012. Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkEmail