> Without that oil to turn into fertilizer, the only other chance is to have ruminants actively managed on a regenerative farm growing both meat and produce. F

> Without that oil to turn into fertilizer, the only other chance is to have ruminants actively managed on a regenerative farm growing both meat and produce. False dilema. There are probably more options, but one that immediately comes to mind is that we could synthesize petroleum from the atmosphere. It'd probably be the only sensible way to do long-range air travel in your scenario anyhow.