You hear about world hunger all the time. You feel pity for those starving people, yet you still go on eating meat. Why is this relevant? Well, a meat-based diet uses two times more land than is necessary for a vegetarian diet. High quality land is used to grow grain and soya beans for animal feed - land that could be used to grow crops for humans. If we stop eating so much meat, less livestock will be raised, and more people could be fed on the protein consumed by beef cattle.