Bhubaneswar, Sep 16: World Ozone Day is observed every year on September 16. This day aims to raise awareness about the protection shield in the Earth's stratosphere. The layer is composed of a high
concentration of ozone molecules.

Nestled at about 10-50 kilometres, above the Earth's surface, it absorbs the Sun's harmful UV (ultraviolet radiation) rays. Without it, exposures to intense UV rays would lead to catastrophic consequences, including a surge in skin cancers and cataracts in humans, reduced agricultural yields, and disruption of marine ecosystems, particularly
phytoplankton, which form the base of the oceanic food web.

The day commemorates the signing of the landmark Montreal Protocol in 1987 on substances that deplete the Ozone Layer. This global treaty was a direct response to the discovery of a massive "ozone hole" over
Antarctica, primarily caused by man-made chemicals like CFCs(chlorofluorocarbons), used in refrigerants, aerosols, and solvents.

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The protocol stands as one of the most successful environmental agreements in history. Mandating the phase-out of ozone-depleting substances (ODS), has led to a significant recovery of the ozone layer. However, the work is not over. The protocol has also had a crucial climate benefit, as many ODS are potent greenhouse gases like CFCs and
HFCs.

The theme for World Ozone Day 2025 is "From Science to Global Action". It serves as a critical reminder of the need to protect and conserve the ozone layer, ensuring a healthier planet for the future generations. Continued vigilance and collective effort will help achieve the mission to protect Earth's atmosphere.

Written by Saijyoti Banita Priyadarshini

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