Question

What is particulate matter, Classify and explain it with suitable examples?

Answer 1

Particulate matter is the general term used for a mixture of solid particles and liquid droplets in the air. It includes aerosols, smoke, fumes, dust, ash and pollen$.$

Classification of Particulate Matter:

$PM_{10}$: inhalable particles, with diameters that are generally 10 micrometers and smaller; and

$PM_{2.5}$: fine inhalable particles, with diameters that are generally 2.5 micrometers and smaller.

Particulate Matter is primarily formed from chemical reactions in the atmosphere and through fuel combustion - motor vehicles, power generation and industrial facilities).

Residential fire places and wood stoves with biomass combustion are also significant producer of particulate matter$.$