I read a disturbing article, "Rethinking the Meat-Guzzler," on the NY Times web site. Meat uses far more energy and water, and it causes far more damage to the environment through runoff, than does vegetable foods. Furthermore, we're eating too much of it for our own health. Yet meat production is subsidized - another very stupid anti-environment, anti-health, anti-free market policy by some folks in Washington, D.C.
As oil runs out, and we find the limits of the agricultural capacity, we will have to choose between producing meat or producing energy. It looks to me like we're all going to be eating a lot less meat in ten years time.