September 16th is International Day for the Preservation of the Ozone Layer, commemorating the 1987 anniversary of the signing of the Montreal Protocol on Substances that Deplete the Ozone Layer. Hailed as an example of exceptional international cooperation for the protection of the ozone layer, the Montreal Protocol became the first international treaty to achieve universal ratification. The Montreal Protocol expanded in October 2016 with the addition of the Kigali amendment.

The International Ozone Commission, on the 31st anniversary of the Vienna Convention for the protection of the Ozone Layer, reports that despite signs of healing, the ozone layer continues to be affected by large ozone depletion in Antarctica. Please see the Press Release.