Energy Return on Investment (EROI)

Energy Return on Investment (EROI) is a measure that compares the amount of energy obtained from a resource to the amount of energy invested in extracting and using that resource. For instance, if it takes 1 unit of energy to extract 10 units of energy, the EROI is 10:1. A higher EROI means a more efficient and beneficial energy source, while a lower EROI suggests that the energy investment is too high relative to the energy gained. Understanding EROI helps assess the sustainability and viability of different energy sources, such as fossil fuels, solar, and wind energy.