World Ozone Day 2021

World Ozone Day 2023 | Date Theme Significance Fact Image

It’s International Day for the Preservation of the Ozone Layer, which we also call World Ozone Day 2023.

Ozone is a layer of Oxygen(O3) molecules in the stratosphere that protects us from harmful sun rays. It gets depleted by some chemical elements that are usually the consequence of human intervention. Hence it becomes our obligation to conserve the layer so that we stay protected from harmful rays. World Ozone Day is a day dedicated to planning, formulating, and enacting toward preserving the Ozone layer.


World Ozone Day 2023 is on the 16th of September.


The theme for world ozone day 2022 was “Global Cooperation Protecting Life on Earth”.

The theme for World Ozone Day 2023 is “Montreal Protocol: fixing the ozone layer and reducing climate change“.

Significance and History

The history of the celebration of world ozone day dates back to 19th December 1994. The United Nations General Assembly declared 16th September as the International Day for the Preservation of the Ozone Layer.

The significance of Ozone layer prevention is way more than many other smaller issues around the world. The layer prevents harmful UV rays and indirectly prohibits global warming. This can be a huge problem and difficult to tackle. Hence Ozone layer is highly significant in the well-being of the planet Earth.

Facts about Ozone

  • What is the Ozone layer? – The ozone layer is the naturally occurring layer of highly reactive O3 molecules in the stratosphere that protects us from potentially harmful ultraviolet radiation(UV-B and UV-C) emitted by the sun.
  • Causes – Ozone Depleting Substances(ODS) such as Chlorine and Bromine are the prime cause of ozone layer depletion. These form Chlorofluorocarbons (CFCs) due to human activities and cause the ozone to deplete.
  • Effects – Ozone layer depletion allows UV rays from the sun to enter the earth’s surface. These rays cause global warming and make it hard for living organisms to survive. It also hinders the natural cycles and causes cancer, skin ailments, etc.
  • Prevention – To prevent the degradation of ozone, we must reduce the use of CFCs, reduce air pollutants, and plant trees. 
  • The ozone is a highly reactive gas and makes the Ozone shield.
  • A single molecule of chlorine can break down thousands of ozone molecules.


World Ozone Day 2021

Ozone Day serves as a reminder that, for both our own sake and the sake of future generations, we must all do our share to save the ozone layer.

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