question_answer

Trees are planted along the roadside to reduce pollution from motor vehicles. How do trees help to reduce pollution?

(i)  They absorb traffic noise.

(ii) They take in carbon dioxide.

(iii) They trap dust and soot from the exhaust pipes of vehicles.

A) (i) and (ii) only

B) (ii) and (iii) only

C) (i) and (iii) only

D) (i), (ii) and (iii)