.@CarnegieMellon engineering prof. Andrew Gellman on shale-r aspwv1970-01-01T00:00:00-05:00January 1st, 1970|Twitter| .@CarnegieMellon engineering prof. Andrew Gellman on shale-related chemical #mfg: “It’s huge” for western Pa. https://t.co/I8wK4nMpk1 Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkEmail