EROI is also why we really need to get off of fossil fuels long before we actually literally run out (i.e. now would be great) As a resource reaches depletion,

EROI is also why we really need to get off of fossil fuels long before we actually literally run out (i.e. now would be great) As a resource reaches depletion, there are two forces acting on EROI: 1) the increased cost of each unit of energy input, and 2) the reduced yield from that energy input. The EROI curve bends negative faster than you think by looking at history.