I go to school with an economic vegitarian. He intends on going into political economics, or something like that, and his reasoning for his vegitarianism is not because of morals or ethics, but because eating animals is not economically sound.
He suggests that it costs at least twice as much for beef for the same amount of soy. First, you need to feed the cow. You'll likely feed the cow soy. Lots and lots of soy. Perhaps, a cow's weight in soy? Then the cost of the land to grow this cows weight of soy on. Then the workers for the soy. Then the workers for the cow.
It makes sense to me, even if I can't (or haven't bothered, one or the other
) verify the truths.