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Ozone pollution increased in several cities during the lockdown

  • IASbaba
  • June 27, 2020
  • 0
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Ozone pollution increased in several cities during the lockdown

Part of: GS Prelims and Mains III – Pollution; Science and Technology 

In news: 

According to an analysis by the Centre for Science and Environment (CSE) – 

  • While particulate matter and nitrous oxide levels fell during the lockdown, ozone increased in several cities.  
  • Ozone is a highly reactive gas and even short-term exposure of an hour is dangerous for those with respiratory conditions and asthma. 
  • Eight-hour average is considered for ozone instead of the 24-hour average for other pollutants

Do you know? 

  • Ozone is not directly emitted by any source but is formed by photochemical reactions between oxides of nitrogen (NOx) and other volatile organic compounds (VOCs) and gases in the air under the influence of sunlight and heat.  
  • It can be curtailed only if gases from all sources are controlled. 

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