Environmental Protection Agency: Ozone-Depleting Substances

This page provides information on compounds recognized as ozone-depleting substances (ODS) under the Montreal Protocol.

The ODS are split into two groups under the Clean Air Act: Class I ODS, such as chlorofluorocarbons (CFCs), and Class II ODS, such as hydrochlorofluorocarbons (HCFCs).

For each ODS, this page provides the compound’s atmospheric lifetime, Ozone Depletion Potential (ODP), Global Warming Potential (GWP), and Chemistry Abstract Service (CAS) registry numbers.

Science Topics
Meteorology, Pollution
Middle School
6th Grade, 7th Grade, 8th Grade

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