Another solution is to increase the supply of available food. No doubt attention should be given both possibilities. Much has already been done to increase plant yield, but this, too, has its limitations. There is yet another factor to consider. Most of the world's millions already are, of necessity, virtual vegetarians.
Meat is a luxury they can afford only occasionally.
Here's the problem. Land used to produce food crops for human consumption feeds about fourteen times as many people as when it is used to grow food for animals, which are in turn to be used for food. Plants will yield 800,000 calories per acre of land, but only 200,000 when these same plant foods are first fed to animals. Let's illustrate this inefficient use of plant life in yet another way. If he were to derive all of his energy from flesh food for a twelve-month period, it would require an equivalent of the meat from four calves.