Because CFCs depletes the ozone layer in the atmo-sphere,in 1987 Montreal Protocol,it was,therefore,decided that there shouldbe a phased reduction in the production and use of CFCs.

• 由于氯氟烃(CFC_s)破坏大气臭氧层,1987年蒙特利尔协议决定对氯氟烃分期削减其生产和使用。