Smog is formed by
  • 1

    smoke and fog

  • 2

    condensation of vapour

  • 3

     fog and NOz

  • 4

    smoke and CO2

Answer:- 1
Explanation:-

Smog is formed out of nitrogen oxides, sulphur oxides, ozone, smoke or particulates among others. Man made smog is formed due to coal emissions, vehicular emissions. It is formed by smoke and fog.

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