Author Archives: energyskeptic

California oil EROI dropped from 6.5 to 3.5 by 2005

Brandt, A. R. October 12, 2011. Oil Depletion and the Energy Efficiency of Oil Production: The Case of California. Sustainability 2011, 3, 1833-1854 [ Brandt estimates the energy return on investment (EROI) dropped from ~6.5 in 1955 to ~3.5 fifty … Continue reading

Posted in EROEI Energy Returned on Energy Invested | Tagged , , , , | Leave a comment

Hall and Lambert: EROI of different fuels and the implications for society

[ Excerpts from the Hall, Lambert, and Balogh EROI paper. You may want to read the original paper here since I’ve left out charts, figures, and text.  In my opinion, EROI is important because it is  due diligence – society ought to … Continue reading

Posted in EROEI Energy Returned on Energy Invested | Tagged , , , , , | 1 Comment

How the Catholic Church and politics helped cause overpopulation and overshoot

[ All of what follows is from the article below.  Mumford makes the case that: “Had the recommendations of NSSM 200 been implemented in 1975, the world would be very different today. The prospects would have improved for every nation … Continue reading

Posted in Carrying Capacity, Population | Tagged , , | Leave a comment

The Hidden Costs of Oil. U.S. Senate hearing 2006.

[ This post has excerpts from the 2006 U.S. Senate hearing “The Hidden Cost of Oil”.  It is a timely reminder, now that gasoline prices are low and peak oil off the radar, that we are nowhere near the American … Continue reading

Posted in Caused by Scarce Resources, Energy Dependence, Energy Policy, Military, Peak Oil | Tagged , , , | Leave a comment

Energy return of ultra-deepwater Gulf of Mexico oil and gas

Moerschbaecher, M., John W. Day Jr. October 21, 2011. Ultra-Deepwater Gulf of Mexico Oil and Gas: Energy Return on Financial Investment and a Preliminary Assessment of Energy Return on Energy. Sustainability 2011, 3, 2009-2026 [Excerpts from this 18 page paper … Continue reading

Posted in EROEI Energy Returned on Energy Invested, Threats to oil supply | Tagged , , , , , | 1 Comment

Tar sand EROI 2013 Poisson and Hall

Alexandre Poisson, Charles A. S. Hall. 2013. Time Series EROI for Canadian Oil and Gas. Energies 2013, 6, 5940-5959 [ This is an extract from this 20-page paper. Tar sands are the hope offered by techno-optimists that a great deal … Continue reading

Posted in Charles A. S. Hall, EROEI Energy Returned on Energy Invested, Oil Sands | Tagged , , , | 1 Comment

Book review of Door to Door and the amazing world of transportation

Edward Humes.  2016. Door to Door: The Magnificent, Maddening, Mysterious World of Transportation. HarperCollins. A book review by Alice Friedemann at www.energyskeptic.com  author of “When Trucks Stop Running: Energy and the Future of Transportation, 2015, Springer] I was in the … Continue reading

Posted in Energy, Transportation, Travel | Tagged , , | 3 Comments

Peter Turchin: violence and social unrest in the U.S. and Europe likely by 2020

[ Peter Turchin, an expert on the cycles of history and the rise and fall of civilizations, has used mathematical models of complex systems to predict political instability. Debora MacKenzie at NewScientist interviewed him about his upcoming book “Ultrasociety” in … Continue reading

Posted in Experts, Peter Turchin | Tagged , , , | Leave a comment

Climate change impacts on transportation 2008 U.S. Senate hearing

Senate  110-1199. June 24, 2008. Climate change impacts on the transportation sector. U.S. Senate Hearing. Excerpts from this 135 page document follow. DANIEL K. INOUYE, U.S. SENATOR FROM HAWAII The transportation sector is a major indicator of the overall economic … Continue reading

Posted in Climate Change, Transportation, Transportation, Transportation | Tagged , , | Leave a comment

How much net energy return is needed to prevent collapse?

[ Charles Hall, one of the founders of EROI methodology, initially thought an EROI of 3 was enough to run modern civilization, which is like investing $1 and getting $3 back. But after decades of research, Hall concluded an EROI … Continue reading

Posted in Charles A. S. Hall, EROEI Energy Returned on Energy Invested | Leave a comment