Question

What is pollutant?

Answer 1

Pollutant:

• The harmful and undesirable substances mixed in the air are called pollutants.
• Air gets polluted by smoke, dust, and coke emitted by running automobiles and chimneys of industries.
• Some common air pollutants are gases like sulphur dioxide (${\mathrm{SO}}_2$), carbon monoxide ($\mathrm{CO}$), and nitrogen oxides (${\mathrm{NO}}_2$).