Acid rain is caused due to increase in concentration of (in atmosphere)

Options

A. `SO_2 and NO_2`
B. `CO and CO_2`
C. `CO and SO_3`
D. `O_3 ` and dust

Answer

A

Explanation

Acid rain results when sulphur dioxide and nitrogen oxides are emitted into the atmosphere and transported by wind and air currents. The `SO_2` and `NO_x` react with water, oxygen and other chemicals to form sulphuric acid and nitric acid. These then mix with water and other materials before falling to the ground.