Iirc, from a land management perspective this is also the most efficient - some land is only good for livestock, not people. So while a vegan diet is a close s

Iirc, from a land management perspective this is also the most efficient - some land is only good for livestock, not people. So while a vegan diet is a close second for "most efficient use of Earth's bounty" the ideal approach for that is a small amount of animal products. That said, we don't need meat. There are countless healthy vegans and vegetarians that are living proof of this.