What do the numbers mean?
PM2.5 and PM10 describe tiny airborne particles by their diameter in micrometres. PM2.5 particles are the finer of the two and can travel deeper into the lungs.
Where do they come from?
- Vehicle exhaust and road dust
- Construction and demolition work
- Burning of fuel, waste and crop residue
- Industrial processes
Why track both
Coarse and fine particles come from different sources, so tracking both helps you find the cause and choose the right fix.
