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The problem is that it is about “some places”, transportation is cheap these days - there is no need to grow food in specific places.

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As long as that transportation is available. Add wars to the mix and you get a very convincing reason to decouple farming from specific place on Earth.

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But that is the crucial contradiction: without political stability vertical farming (capital intensive) is not feasible, with political stability: there are simpler ways, obviously we may find some specific niche here and there: but it is not going to be hugely impactful in universal terms.

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