That doesn't account for the byproducts, assumes ideal efficiency, and puts a huge squeeze on other agriculture. Then there are resources consumed by transporta

That doesn't account for the byproducts, assumes ideal efficiency, and puts a huge squeeze on other agriculture. Then there are resources consumed by transportation, refrigeration, spoilage, etc. As we search out the threshold of unsustainable living maybe we could tap the breaks a bit first? Earth is a nearly closed system we must all share, and cows are a terribly inefficient way to produce protein and calories.