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Which of the following pollutants is the major contributor to photochemical smog?

Which of the following pollutants is the major contributor to photochemical smog?

Q. Which of the following pollutants is the major contributor to photochemical smog?

  1. Peroxynitrates
  2. Hydroperoxides
  3. Nitrogen dioxide
  4. Ozone

Answer: Ozone

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