World Ozone Day 2020 

#GS3 #Environment 

World Ozone Day is observed on September 16, every year. It is celebrated to spread awareness among people about the depletion of the Ozone Layer and search for possible solutions to preserve it. 



  • On December 19, 1994, the United Nations General Assembly proclaimed September 16 the International Day for the Preservation of the Ozone Layer, commemorating the date, in 1987, on which the Montreal Protocol on Substances that Deplete the Ozone Layer was signed. 
  • On September 16, 1987, the United Nations and 45 other countries signed the Montreal Protocol, on substances that deplete the Ozone layer. Every year, this day is celebrated as the International Day for the Preservation of the Ozone layer. 
  • The purpose of the Montreal Protocol is to protect the Ozone layer by reducing the production of substances that are supposed to be responsible for Ozone layer depletion. 


About World Ozone Day 2020  

  • “Ozone for life” is the slogan for World Ozone Day 2020. This year, we celebrate 35 years of global ozone layer protection. 
  • The slogan of the day, “Ozone for life”, reminds us that ozone is crucial for our life on Earth and we must continue to protect the ozone layer for our future generations also. 
  • This year, we celebrate 35 years of the Vienna Convention and 35 years of global ozone layer protection. 


About Ozone layer  

  • Ozone (chemically, a molecule of three oxygen atoms) is found mainly in the upper atmosphere, an area called the stratosphere, between 10 and 50 km from the earth’s surface. 
  • Though it is talked of as a layer, ozone is present in the atmosphere in rather low concentrations. 
  • Even at places where this layer is thickest, there are not more than a few molecules of ozone for every million air molecules. 
  • But they absorb the harmful ultraviolet radiations from the sun. UV rays can cause skin cancer and other diseases and deformities in plants and animals. 
  • In the Earth’s lower atmosphere (troposphere) near ground level, ozone is formed when pollutants emitted by cars, power plants, industrial boilers, refineries, chemical plants, and other sources react chemically in the presence of sunlight. Surface level Ozone is a harmful air pollutant. It may reduce lung function and make breathing difficult. 
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