International Day for the Preservation of the Ozone Layer – 16 September
September 18 , 2021
1321 days
689
- It was designated by the United Nations General Assembly in 1994.
- It is in commemoration of the date in 1987 on which nations signed the Montreal Protocol on Substances that Deplete the Ozone Layer.
- The closure of the hole in the ozone layer was observed 30 years after the protocol was signed.

Post Views:
689