" While researching his book Comfortably Unaware he did a quick calculation and discovered something that captures the folly of trying to have our steak and eat it too.56 He figured that if you had two acres of decent land and placed a cow on it, you would, after two years, have about four hundred pounds of edible beef. That same land, in the same amount of time, for much less of the cost, could produce five thousand pounds of kale and quinoa. This kale and quinoa could be obtained without the additional methane output or trampling impact and, most important, without the slaughter of sentient animals who would rather not be born in order to be killed and eaten by people with a warped sense of what cows were meant to do. "

― James McWilliams , The Modern Savage: Our Unthinking Decision to Eat Animals