Microscopic dust particles found in underground railways may pose health risk. … These tiny dust particles have the potential to penetrate the lungs and the body more easily, posing a risk to someone’s health.”

How many particles does dust have?

Around 5 hundred quadrillion atoms are in a speck of dust.

What is dust science?

Dust is a collection of microscopic particles of material. Dust is heavy enough to see and light enough to be carried by the wind. Dust can be made up of pollen, bacteria, smoke, ash, salt crystals from the ocean, and small bits of dirt or rock, including sand.