You need more than just raw calories, though. How much plant food would it take to match this in terms of protein and B-vitamins? https://imgur.com/a/8zzvcrq h

You need more than just raw calories, though. How much plant food would it take to match this in terms of protein and B-vitamins? https://imgur.com/a/8zzvcrq https://imgur.com/a/8zzvcrq So that's just 1 pound of beef. You could get about 500 pounds of that raising a cow for a couple of years and slaughtering it. What inputs would you need? Not too much, if you have grass, which a lot of the earth does. Let the cow graze, find it water. Optionally fatten it up at the end w/ some grain -- probably a better use than making ethanol out of it, at least. We used to have millions of wild buffalo roaming North America. They were a dietary stable for many Native American tribes. Were they really living in a less sustainable way than modern vegans picking up Impossible Burgers from Whole Foods?