A more realistic goal, it seems to me, is to cut down on consumption of meat. What a difference it would make if everyone reduced the amount of meat he or she eats by half. I'd guess that some people would even realize that they feel better, and might cut back even more, or give it up completely. Change typically happens in small steps, not leaps.

It's also important to buy meat from sources that raise their animals humanely and sustainably (if you have to eat meat at all). Niman Ranch is a great source, and you can get some of their meats locally. Does anyone else know of good sources?