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Every day, 840 million people around the world, including 200 million children, go hungry. But much of the world's grain harvest—40 percent—is used to feed livestock, not people. U.S. livestock alone consume about one-third of the world's total grain harvest, as well as more than 70 percent of the grain grown in the United States. Raising animals for food is much less efficient than growing vegetables, grain, or beans. For example, a cow grazing on one acre of land produces enough meat to sustain a person two and a half months; soybeans grown on that same acre would nourish a person for seven years. The beef in just one Big Mac represents enough wheat to make five loaves of bread. Many researchers believe that vegetarianism is the only way to feed a growing human population. A Population Reference Bureau report stated, "If everyone adopted a vegetarian diet and no food were wasted, current [food] production would theoretically feed 10 billion people, more than the projected population for the year 2050."
