translation.en: It was probably already too late in the 1970s, when the best available scientific theory was telling us that industrial emissions were about to precipitate a new ice age, in which billions would die.
translation.zh: 上世纪70年代的时候也许就已经太晚了， 那时候最先进的科学理论告诉我们工业排放 将促成一个新的冰河世纪，数十亿的人类将从此灭亡。