Select the correct match of air pollution source with the type of pollutant and the effect it produces.

Options

A. Chemical factory `to NO_(2) to ` Ozone hole
B. Automobile exhaust `to N_(2)O to` Asphyxia effect
C. Heavy industry `to CO_(2) to ` Acid rain
D. Incinerators `to NO_(x) " gases " to` Photochemical smog

Answer

D

Explanation

Nitrogen oxides are produced naturally through biological and non-biological activities. Human activity forms nitrogen oxides in combustion process of industries, automobiles, incinerators and nitrogen fertillisers. Nitrogen oxides give rise to photochemical smog.