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A comment on Vertical farming does not save space. Parent comment

Re:Vertical farming does not save space by exporectomy on Saturday February 20, 2021 @04:17PM (#26208071)
Yes. Even fossil fuels contain far more nuclear energy than chemical energy so the engines we use are ~0% efficient if you actually count that as part of the input, even though we could, in principle, build an engine which does use it. How then do you compare two different nuclear fuels for efficiency?
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Re:Vertical farming does not save space by pfdietz on Saturday February 20, 2021 @08:25PM (#26209947)
You don't compare them for efficiency. That's a useless thing to do. You compare for other metrics that actually matter, like cost.
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Re:Vertical farming does not save space by exporectomy on Sunday February 21, 2021 @06:44PM (#26218548)
I know. It was just a rhetorical question to further show the unhelpfulness of efficiency.
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