From Montreal Protocol to Global Action: Ozone Layer Conservation

The global response to ozone depletion began in earnest when scientists presented alarming data on the 1970s. The landmark Montreal Protocol, adopted on 16 September 1987, set legally binding targets to eliminate the use of ozone‑depleting chemicals. It is widely regarded as the most successful environmental treaty to date.

In December 1994, the United Nations General Assembly passed a resolution designating 16 September as World Ozone Layer Protection Day. The first celebration took place in 1995, and each subsequent year the day serves as a platform for education, policy dialogue and community initiatives.

The protocol’s phased approach has already resulted in measurable recovery of the ozone layer. Ongoing monitoring, scientific research, and the inclusion of new substances under the treaty continue to drive progress toward full restoration.