1. Particulate air pollutants are either solids or liquids.
2. Particles having larger diameter of 10 pm settle in the soil but finer particles with 1 pm or less remain suspended in the air.
3. Central Pollution Control Board (CPCB) has declared that, particulate matter of size 2.5 pm or less in diameter (PM 2.5) are responsible for causing the greatest harm to humans.
4. These fine particulates can be inhaled deep into the lungs and are responsible for irritation, inflammation and damage to lungs.
5. In addition to this, it causes breathing and respiratory disorders and premature deaths.
6. Examples of particulate pollutants are : Smoke, smog, pesticides, heavy metals, dust and radioactive elements.
