"It is best to eat local, but we do not have enough arable land to support our population, even in our vast continent, at least not without the application of obscene quantities of natural-gas-derived fertilizer. One must further account for the more than three billion people in the developing world who will need to double or triple their food production to approach a dignified standard of living. Then add the additional two billion who will soon join us. “For the foreseeable future,” writes Smil, “we cannot feed the world without relying on fossil fuels.” He performs similar calculations for the world’s production of energy, cement, ammonia, steel and plastic, always reaching the same result: “A mass-scale, rapid retreat from the current state is impossible.”"
