What is the Minimum EROI that a Sustainable Society Must Have? Part 2: The Economic Cost of Energy, EROI, and Surplus Energy
In real economies, energy comes from many sources – from imported and domestic sources of oil, coal and natural gas, as well as hydropower and nuclear, and from a little renewable energy – most of that as firewood but increasingly from wind etc. Most of these are cheaper per unit energy delivered than oil. So let’s look at what this real ratio of the cost of energy (from all sources, weighed by their importance) is relative to its benefits.


