Vertical farming swaps a land problem for an energy problem, and the energy cost is what stops it feeding the world.

Their wordsWhat stands in the way is energy demand. Growing crops indoors is energy-intensive. So we’re really swapping a land problem for an energy one.

Their wordsI explain why in the essay; the TLDR is that they’re energy hogs. The sun is a really awesome source of calories, and it’s kind of dumb not to take advantage of it.