Producing, Importing, and Exporting Ozone-Depleting Substances

The United States is phasing out ozone-depleting substances ( ODS ozone-depleting substance (ODS) A compound that contributes to stratospheric ozone depletion. ODS include chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), halons, methyl bromide, carbon tetrachloride, hydrobromofluorocarbons, chlorobromomethane, and methyl chloroform. ODS are generally very stable in the troposphere and only degrade under intense ultraviolet light in the stratosphere. When they break down, they release chlorine or bromine atoms, which then deplete ozone. A detailed list of class I and class II substances with their ODPs, GWPs, and CAS numbers is available. ) by reducing the production, import, and export of these substances. Learn about the requirements for companies that produce, import, and export ODS.