Question

Incomplete combustion of coal and petroleum :
(A) increases air pollution.
(B) increases efficiency of machines.
(C) reduces global warming.
(D) produce poisonous gases.
The correct option is :
(A) and (B)
(b) (A) and (D)
(c) (B) and (C)
(d) (C) and (D)

Answer 1

Answer:

c) answer is correct

Explanation:

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