1. Nitrous oxide
  2. Hydrogen dioxide
  3. Chlorofluro carbon
  4. Carbon monoxide
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Option 3 : Chlorofluro carbon

  • Chlorofluorocarbons (CFCs) and other halogenated ozone depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion.
  • The total amount of effective halogens (chlorine and bromine) in the stratosphere can be calculated and are known as the equivalent effective stratospheric chlorine (EESC)
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