"The Green Revolution transformed agriculture by inserting fossil fuels at every turn. Fertilizer came from natural gas. Diesel allowed large-scale mechanization of plowing, planting, harvesting, processing, and transporting large amounts of food. Petrochemical pesticides smote economically worthless (but ecologically invaluable) products of evolution into the foul dust. We fed a growing human population, now 8 billion strong. It boils down to a diet of fossil fuels: again, temporary."