Acid rain is caused by increase in the atmospheric concentration of
(a) SO2 and NO2
(b) SO3 and CO
(c) CO2 and CO
(d) O3 and dust
Acid rain is caused by increase In the atmospheric concentration of SO2 and NO2. These mix with water vapour to form sulphuric acid (H2SO4) and nitric acid (HNO3) respectively which falls on earth in the form of acid rain.