Ka duba nassin da ke ƙasa kuma ka amsa tambayar da ke gaba a yaren da nassin ya yi: Nassin: A shekara ta 1970, bincike ya nuna cewa chlororofluorocarbons (CFCs) da mutum ya yi suna ragewa kuma suna canza kwayoyin ozone a cikin yanayi. CFCs kwayoyin da ke da kwanciyar hankali ne da suka ƙunshi carbon, fluorine, da chlorine waɗanda aka yi amfani da su sosai a cikin kayayyaki kamar firiji.
Shekarar 1988