Category Archives: EROEI Energy Returned on Energy Invested

EROEI of at least 10:1 to Sustain Civilization

Someone named Memmel posted this on theoildrum. He makes the case that 40 to 50% of us have jobs that somehow relate to food, in some way or another supporting the 1-2% who do the actual farming. So once EROEI … Continue reading

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

Charles Hall on EROEI in Scientific American

Will Fossil Fuels Be Able to Maintain Economic Growth? A Q&A with Charles Hall The inventor of the energy return on investment (EROI) metric argues that economic growth could soon stop—and that we need to get smart about incorporating the … Continue reading

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

‘The Oil We Eat’ Following the Food Chain back to Iraq

‘The Oil We Eat’ Following the Food Chain back to Iraq by Richard Manning,   Harpers  | May 23, 2004 [reduced and paraphrased, if this interests you then do read the full article since I cut a great deal of … Continue reading

Posted in Carrying Capacity, EROEI Energy Returned on Energy Invested, Nature & Energy | Leave a comment

David Fridley, LBNL scientist, on why alternative energy won’t save us

My summary of LBNL scientist David Fridley’s 9-page Alternative Energy Challenges. The showstopper is that the entire supply chain for alternative energy resources depend on fossil fuels, from mining basic (rare) metal ores, to fabrication, delivery, maintenance, and spare parts. … Continue reading

Posted in Alternative Energy, An Overview, David Fridley, EROEI Energy Returned on Energy Invested, Expert opinions, Net Energy Cliff | Comments Off

Tilting at Windmills, Spain’s disastrous attempt to replace fossil fuels with Solar Photovoltaics

Book review of “Spain’s Photovoltaic Revolution. The Energy Return on Investment”, by Pedro Prieto and Charles A.S. Hall. 2013.  Reviewed by Alice Friedemann, www.energyskeptic.com Olmedilla, Spain 60MW Solar Photovoltaic Power Plant. Source: SolarNovus Large Solar Installations around the world. This … Continue reading

Posted in Alternative Energy, Bankruptcy, Electric Grid, Energy, EROEI Energy Returned on Energy Invested, Photovoltaic Solar, Solar | 5 Comments

Stephen Leeb & Charles Hall on EROI & Investing

Stephen Leeb. 5 Jun 2013. Dangerous Times As Energy Sources Get Costlier To Extract. Forbes. The optimists believe that our energy problems have been largely solved. I wouldn’t bet on that. The real issue with oil isn’t how much we … Continue reading

Posted in EROEI Energy Returned on Energy Invested | Comments Off

EROI downward spiral

Stephen Leeb. June 2013. Dangerous times as energy sources get costlier to extract. Forbes. Remember the term “peak oil”? With all the oil now available from oil shale, tar sands, and other new sources, many analysts assume that the old … Continue reading

Posted in EROEI Energy Returned on Energy Invested | Comments Off

Net Energy Cliff Will Lead to Collapse of Civilization by 2030

Source: 22 June 2009. David Murphy. The Net Hubbert Curve: What Does It Mean? theoildrum. This is the scariest chart I’ve ever seen.  And also the most important.  I put it on my refrigerator to remind myself what the future … Continue reading

Posted in 2) Collapse, 3) Or a Fast Crash?, An Overview, By People, Energy, EROEI Energy Returned on Energy Invested, Net Energy Cliff, Stages of | 1 Comment

What is global EROI now? A Review of 2012 EROI of Global Energy Resources

Jessica Lambert, Nov 2012. Charles Hall, et. al. EROI of Global Energy Resources Preliminary Status and Trends.  State University of New York, College of Environmental Science and Forestry This 41 page pdf is full of graphs, how EROI is calculated, … Continue reading

Posted in EROEI Energy Returned on Energy Invested | Comments Off

EROEI – Energy Returned on Energy Invested

Before we throw what remaining resources we have at “solutions”, it would really be a good idea to spend the energy on something that might work.  For decades scientists have longed to study EROEI, but haven’t been unable to obtain … Continue reading

Posted in Energy, EROEI Energy Returned on Energy Invested | Comments Off