自从美国杜邦化学工业公司研制并大量生产氟利昂用作降温致冷剂和保温层发泡剂以来,几十年间,电冰箱和空调器走进千家万户,人们在炎热的夏天能够喝上清凉可口的饮料,食品能够四季保鲜、居室不再有严冬和酷夏,可以四季如春。氟得昂与电子技术给人们带来了舒适和文明,给经济带来了繁荣。 70年代发现大气层中臭氧层变薄,80年代发现南极上空出现臭氧层空洞,90年代北极上空也出现臭氧层空洞,经观测和研究发现这是由于大量使用氟利昂 Since the DuPont Chemical Industry Co., Ltd. developed and mass-produced Freon as a cooling refrigerant and insulating layer foaming agent, refrigerators and air conditioners have been introduced into millions of households for decades. People can drink cool and delicious food in hot summers. The beverages and foods can be preserved in four seasons, and the living room no longer has severe winters and cool summers. It can be spring seasons. Fluoride and electronic technology have brought comfort and civilization to people and brought prosperity to the economy. In the 1970s, the thinning of the ozone layer in the atmosphere was discovered. In the 1980s, an ozone hole was discovered over the Antarctic. In the 1990s, an ozone hole was also formed over the Arctic. Observing and studying found that this was due to the heavy use of Freon.