氯原子和一氧化氮（NO）都能与臭氧反应， 正在世界大量生产和使用CFCs由于其化学稳定性好（如CFC12的大气寿命为102年）不易在对流层分解，通过大气环流进入臭氧层所在的平流层，在短波紫外线UV-C的 照射下，分解出CI 自由基，参与了对臭氧的消耗。
Chlorine atom and nitric oxide (no) can react with ozone. CFCs are widely produced and used in the world because of their good chemical stability (for example, the atmospheric life of cfc12 is 102 years). CFCs are not easy to decompose in the troposphere. They enter the stratosphere where the ozone layer is located through the atmospheric circulation. Under the irradiation of short wave UV-C, they decompose CI free radicals and participate in the depletion of ozone.