Micro dust, also known as particulate matter, is a mixture of solids and liquid droplets that vary in size and are often referred to as "particulate matter". Particles of concern include both "fine" particles and somewhat larger "coarse" dust particles. Fine particles, specifically known as PM2.5, are particulate matter that can be found in the air that is incredibly small — a single particle has a diameter of less than 2.5 micrometers, which means you can easily fit 40 fine dust particles across the width of a single strand of hair. Fine dust size renders it practically invisible; it can only be detected with an electron microscope. Although it may be small, fine dust shouldn’t be underestimated — in fact, its size is what makes it more formidable. Unlike larger (and more visible) dust particles, PM2.5 are able to bypass your nose and throat and be absorbed by your lungs and bloodstream, leading to a variety of health effects. Coarse dust particles range in size from 2.5 to 10 micrometers in diameter. Particles of this size are produced during crushing or grinding and from vehicles traveling on paved or unpaved roads.
In summary, micro dust is a mixture of solids and liquid droplets that vary in size and can be found in the air. Fine dust, specifically known as PM2.5, is particulate matter that is incredibly small and can be absorbed by your lungs and bloodstream, leading to a variety of health effects. Coarse dust particles are larger than PM2.5 and are produced during crushing or grinding and from vehicles traveling on paved or unpaved roads.
