WOzone depletionWBromochloromethaneWBromodifluoromethaneWBromofluorocarbonWChloropentafluoroethaneWOzone–oxygen cycleWDibromodifluoromethaneWDibromofluoromethaneWInternational Day for the Preservation of the Ozone LayerWOzone layerWMontreal ProtocolWOzone monitoring instrumentWPolar stratospheric cloudWScientific Assessment of Ozone DepletionWTotal Ozone Mapping SpectrometerWTropospheric ozone depletion events