The "538" website has elaborated on limits to fracked oil production in the Bakken that Alan Drake first brought to us here. North Dakota’s Oil Bonanza Is Unsustainable: http://fivethirtyeight.com/features/north-dakotas-oil-bonanza-is-unsustainable/ via DuckDuckGo for iOS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Join the conversation on 21st Century Transportation which provides the infrastructure so you can walk, bike or take transit instead of having to drive for every trip, and have low carbon cars and fuels when you do drive, at http://connect.sierraclub.org/Groups/Green_Transportation To unsubscribe from the CONS-TRANS-CHAIRS-FORUM list, send any message to: [log in to unmask] Check out our Listserv Lists support site for more information: http://www.sierraclub.org/lists/faq.asp Sign up to receive Sierra Club Insider, the flagship e-newsletter. Sent out twice a month, it features the Club's latest news and activities. Subscribe and view recent editions at http://www.sierraclub.org/insider/