Which of the following is a manmade source of air pollution? (A) Automobile exhaust (B) Forest fire (C) Bacterial action in soil and swamp areas (D) All (A), (B) and (C)

Which of the following is a manmade source of air pollution?
(A) Automobile exhaust
(B) Forest fire
(C) Bacterial action in soil and swamp areas
(D) All (A), (B) and (C)
by

1 Answer

Answer :

(A) Automobile exhaust
by

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