I can't find the research I read a few years ago but from what I understand growing indoors is crazy practical. Plants need less sun light, essentially zero pesticides, can grow much faster and if you build your structures vertically you'll be able to farm the same amount of food on orders of magnitude less space.

I don't know if we're at the point where it can be practical today, especially with so much subsidy in farming, but I'm very optimistic about it moving to automated systems within buildings that wouldn't even need the sun.