Energy Return on Energy Investment (EROEI)

Definition

EROEI is a measure of the amount of usable energy obtained from an energy source compared to the amount of energy invested to obtain it. It helps determine the efficiency and sustainability of different energy sources.

Related terms

Fossil Fuels:

These are non-renewable energy sources like coal, oil, and natural gas that have varying EROEIs.

Renewable Energy Sources:

These include solar, wind, hydroelectric power, and geothermal energy which generally have higher EROEIs than fossil fuels.

Net Energy: This refers to the actual usable energy obtained after subtracting the energy invested in obtaining it. It is closely related to EROEI.