Agreed. People don't realize that farming uses essentially all the land not because it needs all the land, but because that's the cheapest way of producing th

Agreed. People don't realize that farming uses essentially all the land not because it needs all the land, but because that's the cheapest way of producing the required amount of food. We could produce more food on less land, but that would make food more expensive. In the extreme, a greenhouse can produce 1000x as many calories per acre than dryland farming can. But a greenhouse can't produce 100,000 calories for $6 like a dryland farm can. (1 bushel of wheat is almost 100,000 calories and sells for $6). But more expensive food can and has provoked severe world-wide crisis. So that's what we need the second green revolution for -- to handle increasing demand without raising prices. You're not going to reduce food costs with vertical farming, but radical approaches to meat and meat substitutes certainly can.