Which of the following is not a secondary air pollutant? (A) Ozone (B) Photochemical smog (C) Sulphur dioxide (D) All (A), (B) & (C)

Which of the following is not a secondary air pollutant?
(A) Ozone
(B) Photochemical smog
(C) Sulphur dioxide
(D) All (A), (B) & (C)
by

1 Answer

Answer :

(C) Sulphur dioxide
by

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