The best reason I ever heard for going vegetarian was somebody who explained, "I didn't have much money, and meat was expensive." So she learned all she could about vegetarianism and cooking, and the last I heard she was teaching "Quick and Easy Vegetarian Cooking" classes at the local adult school.
In terms of morality, I'll only say that it's a copout to eat an animal that somebody else killed, if you couldn't bear to kill it yourself. If you would do it, though, that's another matter.
Eventually, if the world keeps adding population, meat's going to become more expensive anyway, unless we find a way to grow it in vats or something. Cattle grazing either takes a lot of land, or it takes a lot of grain. And I think if you're corn-feeding a cow, it takes something like ten pounds of feed to make one pound of cow. Right now we're swimming in corn in this country, mainly because of steep government subsidies. But someday...
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