International Day for the Preservation of the Ozone Layer: Theme, History and Meaning


New Delhi: On September 16 of each year, the International Day for the Preservation of the Ozone Layer is celebrated. It is celebrated to make people aware of the depletion of the ozone layer and to look for possible solutions to preserve it. The day, also known as World Ozone Day.


“Global cooperation to protect life on Earth” has been chosen as this year’s theme for the international protection of the ozone layer in order to promote sustainable development.


In 1994, the United Nations General Assembly (UNGA) declared September 16 as the International Day for the Preservation of the Ozone Layer. The day marks the signing of the Montreal Protocol on Substances that Deplete the Ozone Layer in 1987 to preserve the ozone layer and prevent further damage. This protocol, which curbs the use of ozone-depleting chemicals such as aerosols, halons and chlorofluorocarbons, halons, was the first to be ratified by the UN’s 197 members.


The ozone layer, also known as the ozone shield, is a delicate layer of gas in the Earth’s stratosphere that absorbs most of the Sun’s ultraviolet rays, which are harmful to human life and other ways of life These rays can cause numerous skin diseases. The layer absorbs between 97 and 99 percent of ultraviolet rays and maintains the ozone-oxygen cycle.

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