So this is what commodity corn can do to a cow: industrialize the miracle of nature that is a ruminant, taking this sunlight- and prairie grass-powered organism and turning it into the last thing we need: another fossil fuel machine. This one, however, is able to suffer. 
Michael Pollan, The Omnivore's Dilemma: A Natural History of Four Meals
cattle, corn, cows, factory-farms, food, industry, oil, petroleum