Which of the following is not a natural source of air pollution? (A) Volcanic eruptions and lightening discharges (B) Biological decay of vegetable matter (C) Photochemical oxidation of organic matter (D) None of these

Which of the following is not a natural source of air pollution?
(A) Volcanic eruptions and lightening discharges
(B) Biological decay of vegetable matter
(C) Photochemical oxidation of organic matter
(D) None of these
by

1 Answer

Answer :

(D) None of these
by

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