Whenever you burn fuel, you give off carbon dioxide, and mankind's consumption of coal and petroleum has increased by twelve fold since the early nineteenth century.
由十九世紀初至一九八五年，人類使用煤、石油的消耗量增加了十二倍，石化燃料的消耗，更無可避免的呈幾何增加，「現代人急著要把累積在地底千百萬年的石油，都在這一代挖出來用光」，一位生態保育人士頗不以為然，卻又徒呼奈何。