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. Yet the turkey she raises is a much smaller factor in advancing global warming than the cattle on her ranch because they produce meat much more efficiently. Birds need only a fraction of the food that cattle do to gain a pound of meat. Kellman San Antonio, Oct.