Energy return on investment (EROI) is a method for evaluating the feasibility of developing an energy source. (The amount of energy produced by the source must be larger than the amount of energy used to obtain and use the source.) Which one of the following is typical for the EROI for a source?
A. New fossil fuel sources generally have a lower EROI than older ones.
B. Hydroelectricity has a low EROI.
C. Ethanol from corn or sugar cane has a high EROI.
D. Most renewable sources have a higher EROI than fossil fuel sources.
Answer: A
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a. True b. False
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