Rearing animals for food is simply not sustainable with the frightening rise of the human population Even if animals were stacked up in tiers like battery hens they still have to be fed. The land used to grow food for animals needs to be used to grow food for humans. There is light on the horizon for meat eaters. Meat is being grown in laboratories andf evidently it is no different in taste to animal flesh. It doesn't need to be fed with precious grain or soya and no animals will need to suffer and die in some hideous slaughter house.