Fascinating Facts About the Ozone Layer 

The ozone layer is a fascinating natural phenomenon that plays a crucial role in protecting life on Earth from harmful ultraviolet (UV) radiation. Here are some fascinating facts about the ozone layer:

Ozone (O3) is a molecule composed of three oxygen atoms. It forms in the Earth's stratosphere when oxygen molecules (O2) are broken apart by solar UV radiation and recombine into ozone.

Ozone Formation 

The ozone layer is primarily found in the Earth's stratosphere, approximately 10 to 30 kilometers (6 to 19 miles) above the Earth's surface.


Ozone molecules are excellent at absorbing and blocking most of the Sun's harmful ultraviolet (UV) radiation, particularly the most dangerous UV-C and most UV-B rays.

Ozone Absorbs UV Radiation 

The term "ozone hole" refers to a region of significantly reduced ozone concentration, particularly over Antarctica. It was first discovered in the 1980s and was linked to the use of chlorofluorocarbons (CFCs) in various products like aerosol sprays and refrigerants. 

Ozone Hole 

In 1987, the international community adopted the Montreal Protocol, an agreement aimed at phasing out the production and use of ozone-depleting substances, including CFCs.  

Montreal Protocol

Human-made chemicals, such as CFCs, release chlorine and bromine atoms in the stratosphere, leading to ozone depletion. 

Ozone Depletion Causes 

Depletion of the ozone layer leads to increased exposure to harmful UV radiation at the Earth's surface, which can cause various health issues, including skin cancer, cataracts, and immune system suppression.

UV Radiation  Health Effects

International Day for the Preservation of the Ozone Layer is celebrated on September 16th each year to raise awareness about the importance of protecting the ozone layer and the success of the Montreal Protocol.

World Ozone Day