translation.en: Consider, the single most successful international environmental effort of the 20th century, the Montreal Protocol, in which the nations of Earth banded together to protect the planet from the harmful effects of ozone-destroying chemicals used at that time in air conditioners, refrigerators and other cooling devices.
translation.zh: 20世纪最为成功的 国际环境保护条例， 蒙特利尔法案 旨在联合世界各国以保护我们的星球免于 受到当时在空调，电冰箱和其它冷却设备中 广泛使用中的 臭氧破坏化学物的影响。