Category Archives: Experts

experts in energy, ecology, collapse, carrying capacity, biophysical and neoclassical economics, etc.

Gail Tverberg: Why peak coal, oil, and natural gas will all happen at the same time

China: Is peak coal part of its problem? by Gail Tverberg,  OurFiniteWorld.com  | Jun 20, 2016 The world’s coal resources are clearly huge. How could China, or the world in total, reach peak coal in a timeframe that makes a … Continue reading

Posted in China, Gail Tverberg, Peak Coal, Peak Natural Gas, Peak Oil | Tagged , , | Leave a 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

Posted in Biofuels, Biomass EROI, Charles A. S. Hall | Tagged , , , | Leave a comment

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

U.S. House hearing on how to get Central Asian oil before Russia and China do, 2006

[ Make no mistake: one of the main focuses of the U.S. government is to keep crude oil flowing, because without oil, civilization as we know it collapses. This is because the transportation that matters most – heavy-duty diesel-engine trucks … Continue reading

Posted in Energy Dependence | Leave a comment

After a collapse will people grow their own food or plunder others?

[ In this post Ugo Bardi looks at what will happen if society collapses and we have to suddenly go back to pre-industrial agriculture conditions.  A back to the land movement where people grow their own food may not happen. … Continue reading

Posted in Agriculture, Peak Food, Phosphorus, Scientists, Soil, Ugo Bardi | Tagged , , | 6 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

Book review of Failing states, collapsing systems biophysical triggers of political violence by Nafeez Ahmed

[ In this post I summarize the sections of Nafeez’s book about the biophysical factors that bring nations down (i.e. climate change drought & water scarcity, declining revenues after peak oil, etc.) The Media tend to focus exclusively on economic … Continue reading

Posted in Agriculture, Cascading Failure, Caused by Scarce Resources, Collapse of Civilizations, Collapsing, Drought, Drought, Exports decline to ZERO, Interdependencies, Limits To Growth, Middle East, Net Energy Cliff, Other Experts, Over Oil, Overpopulation, Peak Oil, Violence, War & Violence | Tagged , , , , , | 3 Comments

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

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

Agricultural Transportation and Energy Issues. Senate hearing 2005.

[ After reading this hearing, I can’t help but wonder if the main reason for ethanol is to subsidize farmers.  It certainly does nothing for the energy crisis since the net energy is probably negative and at best break-even.    Since … Continue reading

Posted in Energy Dependence, Transportation, Transportation, Trucks | Comments Off on Agricultural Transportation and Energy Issues. Senate hearing 2005.

Ugo Bardi: The Hill’s Group report

[ The Hill’s group consists of energy insiders, and I must admit I was impressed by the predictions they said their model had already gotten right, such as the drop in oil price when everyone was expecting the price to … Continue reading

Posted in Hill's Group Etp Model, Ugo Bardi | Tagged , , | Comments Off on Ugo Bardi: The Hill’s Group report