Tuesday, March 16, 2010

What is the Minimum EROI that a Sustainable Society Must Have? Part 1: Surplus Energy and Biological Evolution
David Murphy, The Oil Drum: Net Energy

EROI theory is rooted in the biological principle that in order to survive each species on earth must procure more energy from its food than it expends attaining that food. From this basic principle the importance of energy surplus became evident, as food sources needed to “pay” not only for metabolism but also for reproduction and storage for leaner times. Part 1 of this three part series presents a brief history of the concept of surplus energy and how it has influenced both biological and human evolution.



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