From 20002009, the Bahamas met its obligations under the Montreal Protocol on Substances that Deplete the Ozone Layer. The Montreal Protocol is an international agreement made in 1987.It was designed to stop the production and import of ozone depleting substances. This page summarizes the history of international cooperation on the protection of the ozone layer, including: the Vienna Convention; the Montreal Protocol. A hole that opens annually in the ozone layer over Earth's southern pole was relatively small in 2024 compared to other years. Could the Montreal Protocol be the world's most successful treaty? In 1987, countries around the world came together to sign it.