Dust is a small particle floating in the air. Moving when the wind blows, it will blow in the air and fall to the ground.

The amount of dust before falling to the ground will be the weight of each type of dust.

Which these dust originated from 2 parts which are naturally occurring.

Caused by humen activity and size of duct which call as micron



Dust size of 10 microns is classified as coarse dust. Which is attached to the respiratory track dust with a

size of 2.5 microns is placed in a small dust that can enter the lungs. And dust size about 0.1 micron

is classified in fine dust that is very small.

Which can penetrate into various organs of the body and resulting in increased risk of cancer in different parts.