1. Coarse particulate matter (PM10): This category includes particles with diameters ranging from 2.5 to 10 micrometers (µm). These particles are typically generated from sources such as road dust, construction activities, and industrial processes.
2. Fine particulate matter (PM2.5): This category includes particles with diameters smaller than 2.5 µm. These particles are much smaller than the width of a human hair and can easily penetrate deep into the lungs, posing a significant health risk. They are often generated from combustion sources like power plants, vehicles, and wildfires.
