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  Saniya Rizwan wrote a new blog entry:

  

  OZONE LAYER (Current environmental issue)

  OZONE LAYER (Current environmental issue)
  Ozone layer, also called ozonosphere, region of the upper atmosphere, between roughly 15 and 35 km (9 and 22 miles) above Earth's surface, containing relatively high concentrations of ozone molecules (O...

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  • November 23, 2019