在即将过去的２０世纪中，化学及化工生产技术的迅猛发展为人类创造着巨大的物质财富，但同时也对环境造成了污染，引发了一系列环境问题。例如制冷剂氟里昂的使用引起臭氧层空洞；二氧化碳的大量排放引起“温室效应”等等。我们在化学教学中必须重视环境问题，加强对青少年的 In the coming 20th century, the rapid development of chemical and chemical production technologies has created tremendous material wealth for humans, but it has also caused pollution to the environment and triggered a series of environmental problems. For example, the use of the refrigerant freon causes ozone holes; large amounts of carbon dioxide emissions cause a “greenhouse effect” and so on. We must pay attention to environmental issues and strengthen the