Tag Archives: EROI

Richard Heinberg on why low oil prices do not mean there is plenty of oil, EROI, collapse

[ Yet another wise, thoughtful, and wide-ranging essay from my favorite writer of the many facets of a civilization about to decline as it is starved of the fossil fuels that feed it.  Although the topics are quite varied, Heinberg … Continue reading

Posted in Oil, Peter Turchin, Richard Heinberg, Social Disorder | Tagged , , , , , , , | 8 Comments

Peak soil: Industrial agriculture destroys ecosystems and civilizations. Biofuels make it worse.

Alice Friedemann. 2017. Peak Soil.  Last update Oct 23, 2017, first 2007 [ Formerly titled: Why Biofuels are Not Sustainable and a Threat to America’s National Security.  Shorter versions appear in the following books: Jacqueline Langwith, ed. 2008.  “Opposing Viewpoints: Renewable … Continue reading

Posted in Alternative Energy, Biofuels, Biomass, Energy, Peak Biofuels, Soil, Soil | Tagged , , , , , , , , , , , , | 2 Comments

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

Posted in EROEI Energy Returned on Energy Invested, Oil & Gas Fracked | Tagged , , , , , , | 1 Comment

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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Murphy & Hall 2011 Adjusting the economy to the new energy realities of the second half of the age of oil

[ Below are excerpts from this 5 page paper, slightly rearranged, go here to see all of the text, figures, and tables.   Alice Friedemann   www.energyskeptic.com  author of “When Trucks Stop Running: Energy and the Future of Transportation, 2015, Springer] Murphy, … Continue reading

Posted in Charles A. S. Hall, EROEI Energy Returned on Energy Invested, How Much Left | Tagged , , | 2 Comments

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

Posted in Charles A. S. Hall, EROEI Energy Returned on Energy Invested, Pedro Prieto | Tagged , , , | 3 Comments

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

[ Pedro Prieto presented an update on June 20, 2017 at the International Society for Biophysical Economics “Spain’s Solar Revolution Revisited: six years later” here: Pedro-Prieto_ISBPE_2017-Spains-solar-revolution-revisited.pdf.   See the pdf for more information Losses in book overestimated and revised Before / … Continue reading

Posted in Charles A. S. Hall, EROEI Energy Returned on Energy Invested, Pedro Prieto, Photovoltaic Solar, Solar EROI | Tagged , , , | Comments Off on Tilting at Windmills, Spain’s disastrous attempt to replace fossil fuels with Solar PV, Part 2

EROI of Canadian Natural Gas. A peak was reached despite enormous investment

[ Although I’ve extracted much of this paper, it is not complete—there are missing equations, figures, tables, and text– so see the paper for details (it is available online).  I’ve rearranged the order of the paper.  The conclusion is just … Continue reading

Posted in EROEI Energy Returned on Energy Invested, Natural Gas, Peak Natural Gas | Tagged , | 4 Comments

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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Why tar sands, a toxic ecosystem-destroying asphalt, can’t fill in for declining conventional oil

[ This is a book review of Tar Sands: Dirty Oil and the Future of a Continent, 2010 edition, 280 pages, by Andrew Nikiforuk. Many “energy experts” have said that a Manhattan tar sands project could prevent oil decline in … Continue reading

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