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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?
Multiple Choice
New fossil fuel sources generally have a lower EROI than older ones.
Most renewable sources have a higher EROI than fossil fuel sources.
Ethanol from corn or sugar cane has a high EROI.
Hydroelectricity has a low EROI.New fossil fuel sources generally have a lower EROI than older ones.

Respuesta :

New fossil fuel sources generally have a lower EROI than older ones. Energy generated in relation to the energy consumed to create it is measured using the Energy Return on Investment (EROI) ratio.

The ratio, for instance, would show how much energy is used on finding, extracting, transporting, and refining crude oil in comparison to the amount of usable energy produced. Energy sources that can be accessed relatively inexpensively will allow the price to remain low, hence the energy return on investment (EROI) is a major factor in determining the cost of energy. EROI is crucial because an energy plant is not economically feasible if its costs exceed its earnings from selling power. Organizations and governments may assess the profitability of various energy sources, such as nuclear vs. solar electricity, with the aid of EROI.

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