Energy Products: Return on Investment is Already Too Low | Our Finite World: "Commenters frequently remark that such-and-such an energy source has an Energy Return on Energy Invested (EROI) ratio of greater than 5:1, so must be a helpful addition to our current energy supply. My finding that the overall energy return is already too low seems to run counter to this belief. In this post, I will try to explain why this difference occurs. Part of the difference is that I am looking at what our current economy requires, not some theoretical low-level economy. Also, I don’t think that it is really feasible to create a new economic system, based on lower EROI resources, because today’s renewables are fossil-fuel based, and initially tend to add to fossil fuel use."
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