2.5 microns are tiny particles suspended in the atmosphere.
When we breathe them in they can cluster on the lining
of the lungs. They've been linked to heart attacks,
strokes and skin ageing.
But particles of 0.1 microns are much smaller…
0.1 microns, or ultrafine particles, are much smaller. In fact, you can fit 1,000 across the diameter of a human hair. And they travel even further into the lungs.
These ultrafine particles are much smaller, so they travel further inside our bodies. They collect in the smaller branches and gas exchange regions of the lungs.