1992年6月於巴西之国际环境开发会议(地球高峰会议)上,世界各国首脑均参与热烈讨论地球环境保护问题,而受全世界注目,会议最重要之中心议题——是关於“臭氧层之破坏”,保护地球生物而减少紫外线的臭氧层,因近年来受大量氟氯碳化物之排出,而遭受破坏,致使地球上紫外线之害处剧增。据医学上之研究;紫外线最易引起皮肤癌、白内障、角膜和遗传因子异常……等。首先 At the International Conference on Environmental Development in Brazil (Earth Summit) in June 1992, heads of all nations of the world took part in the heated discussion on the issue of the protection of the Earth’s environment. At the global level, the most important central issue of the conference was about “the destruction of the ozone layer ”The ozone layer, which protects the earth’s biology while reducing ultraviolet light, has been destroyed by the discharge of large quantities of CFCs in recent years, causing a sharp increase in the harmful effects of UV light on Earth. According to medical research; UV most likely to cause skin cancer, cataracts, corneal and genetic abnormalities ... and so on. First of all