Ozone, often referred to as “Earth’s Umbrella,” plays a crucial role in protecting our planet from harmful UVB rays. However, human activities have led to the depletion of the ozone layer, resulting in an ozone hole. The Vienna Convention for the Protection of the Ozone Layer, signed by 28 nations on March 22, 1985, was a significant step towards international collaboration in safeguarding the ozone layer.
In 2025, the ozone hole over Antarctica has expanded to 20 million square kilometers. Although larger than usual, NASA’s Ozone Watch indicates it’s within the typical range for this decade. World Ozone Day, observed on September 16, marks the 40th anniversary of the Vienna Convention. This year’s theme, “From Science to Global Action,” highlights the success of international efforts against ozone depletion.
The Montreal Protocol, pivotal in this achievement, has phased out CFCs and now targets HFCs, potent greenhouse gases. Despite progress, challenges remain. Aerosol injections into the stratosphere, intended to cool the Earth, may exacerbate ozone loss. The depletion impacts not only humans but also affects Arctic phytoplankton habitats.
India is actively addressing ozone layer depletion through its India Cooling Action Plan and national strategy to phase down HFCs under the Kigali Amendment. These initiatives build on India’s past successes in eliminating other ozone-depleting substances. International collaborations continue, with India working closely with organizations like UNEP and UNDP to meet its Montreal Protocol obligations. The Ozone Cell monitors progress and reports to the Multilateral Fund of the Montreal Protocol.
