Tag Archives: EROEI

Minerals: Natural gas from Ugo Bardi’s “Extracted”

Bardi, Ugo. 2014. Extracted: How the Quest for Mineral Wealth Is Plundering the Planet. Chelsea Green Publishing. NATURAL GAS.  As figure 1 shows, the average EROEI required to run industrial society as we know it is around 8 to 10.   … Continue reading

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Why studies come up with different Energy Returned on Invest (EROI) results: can it be fixed?

[ There are many issues with biofuels beyond their trivial to negative energy return on investment (EROI). In Peak Soil I point out that current industrial farming techniques are destroying topsoil about 15 times faster than pre-fossil fuel economies — … Continue reading

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EROI explained and defended by Charles Hall, Pedro Prieto, and others

[ If you found this post interesting, the following posts are even better (more detailed and in-depth): Tilting at Windmills, Spain’s disastrous attempt to replace fossil fuels with Solar PV, Part 1 Tilting at Windmills, Spain’s disastrous attempt to replace … Continue reading

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Tilting at Windmills, Spain’s disastrous attempt to replace fossil fuels with Solar PV, Part 2

[ In Charles Hall’s latest 2017 book, “Energy Return on Investment: A Unifying Principle for Biology, Economics, and Sustainability“, he says that he has embarked on a project to discover why solar advocate EROI results are so much higher than … Continue reading

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Are biofuels a sustainable and viable energy strategy?

[In 2000, Melanie Kenderine at the U.S. Department of energy stated that: “This nation has abundant biomass resources (grasses, trees, agricultural wastes) that have the potential to provide power, fuels, chemicals and other bio-based products” (136). That’s a good point … Continue reading

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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

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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

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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

Why aren’t net energy and Energy Returned on Invested the basis of U.S. energy policy?

[ David Murphy doesn’t answer this question, but does give the history of EROI and more importantly, what this means for oil production and society.  If we are going to spend money on fossil alternatives, wouldn’t it make sense to … Continue reading

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Tilting at Windmills, Spain’s disastrous attempt to replace fossil fuels with Solar PV, Part 1

Book review by Alice Friedemann at energyskeptic of “Spain’s Photovoltaic Revolution. The Energy Return on Investment”, by Pedro Prieto and Charles A.S. Hall. 2013. Springer. This book is the best EROI study that has ever been done. It is based … Continue reading

Posted in Alternative Energy, Alternative Energy Resources, Charles A. S. Hall, Debt, Electric Grid, Energy, EROEI Energy Returned on Energy Invested, Pedro Prieto, Photovoltaic Solar, Solar, Solar EROI | Tagged , , , , , , , , | 26 Comments