Three hundred trout are required to support one man for a year. The trout, in turn, must consume 90,000 frogs, which must consume 27 million grasshoppers, which live off of 1,000 tons of grass.
— Jeremy Rifkin, The The Third Industrial Revolution: How Lateral Power Is Transforming Energy, the Economy, and the World (St. Martin’s Press, October 4, 2011)