This is already a thing I think - Vertical farming its called - here's some links https://www.youtube.com/results?search_query=vertical+farmin.... Though its mainly in land constrained places like Singapore or places that are frozen much of the year, or deserts. There is a solar powered tomato green house in Australia I'm aware of https://reneweconomy.com.au/world-first-solar-tower-powered-... last I heard they were talking about copying it and making them around the world it was going so well