Twenty years ago, governments adopted the Montreal Protocol, a treaty to protect the Earth’s ozone layer from emissions of destructive chemicals. Few could have foreseen how far-reaching that decision would prove to be.
就在二十年前，为了保护地球的臭氧层不受有害气体排放的侵袭，全球各国政府共同签署了《蒙特利尔议定书》。而当年只有少数人能预见到这个决定的意义是如此深远。