Because of the ozone depletion and green house effect, chlorofluorocarbon (CFC), known as Freon, has been banned to be used in the whole world.

• 氯氟烷烃(CFC)即氟里昂,因对臭氧层的破坏和温室效应而导致禁用,以其为抛射剂的药用吸入气雾剂将于2010年全面退出中国市场。