A international environmental agreement (one of the first) to prevent the use of substances that are harmful to ozone, such as chlorofluorocarbons and halons, in order to protect the ozone layer in a global manner. It was agreed upon in 1987 and has been amended repeatedly since that time.
[Science; v265: page 1806; 1994.] [Nature; v367: pages 505-508; 1994.]
Source: Atmospheric Chemistry Glossary