From the film 'Cowspiracy' (watch it if you care about the environment or animals) we have over 7.3 billion people in this world, and this number is going to keep increasing. We raise 70,000,000,000 farm animals. If we look at cows, cows need a lot more than we do food and water wise. Does this not strike anyone as insane, the way we gorge on meat (and dairy, but meat is the biggest issue)? And to raise 70,000,000,000, think about how much forestry we'd have to cut down for farming? More so for ethical farming, which I'd support over factory farming any day, but still.