Fig. 2: Fossil fuel EROI values. | Nature Energy

Fig. 2: Fossil fuel EROI values.

From: Estimation of useful-stage energy returns on investment for fossil fuels and implications for renewable energy systems

Fig. 2

a, Final- and useful-stage average EROI by fossil fuel group at the global level. b, Useful-stage EROI by end-use category by fossil fuel group at the global level. Calculations consist of a weighted average of fossil fuels used as fuels, electricity and heat. This explains the non-null value for coal products used in road propulsion, which represents coal products used in the form of electricity for road propulsion (that is, in electric vehicles).

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