From Today's New York Times

Animal Ethics

As a parent of young children, I have much to worry about regarding what my children eat—a balanced, wholesome diet, free from antibiotics, hormones or bacteria. But the method she advocates for reaching those goals—raising grass-eating, pasture-foraging farm animals—would appear to be notoriously difficult to reproduce on a scale large enough to harvest enough meat, at a reasonable cost, for all the people wanting to eat meat in this country, let alone the world.