> Greenhouses can produce several orders of magnitude more food per acre than dryland mechanized farming does. If we climate control them and light them. Then

> Greenhouses can produce several orders of magnitude more food per acre than dryland mechanized farming does. If we climate control them and light them. Then yes. It also depends on the crop being grown. That takes electricity. There are many crops that simply aren't well suited to greenhouses. Primarily because they are nutrient thin. Those are popular crops that people and livestock eat. And, importantly, we don't have those greenhouses built yet. Not even a fraction of a percentage of our food comes from them today. It's possible that we can make the switchover, but that will take decades of build out. The other thing to consider is we won't really have much warning before we need these greenhouses. About the only thing that will trigger action here with the way society is structured is famine. Importantly, capitalism will work against wanting to produce these greenhouses as famine will kick up prices and traditional farming will remain the cheapest way to produce food. Plenty of large corporate farmers will be happy to just continue raising prices rather than build out.