PM stands for Particulate Matter. It refers to the size of airborne particles like pollen, dust, and soot, which are usually minute and inhalable. There are two main subcategories of particulate matter – PM2.5 and PM10.
PM stands for Particulate Matter. It refers to the size of airborne particles like pollen, dust, and soot, which are usually minute and inhalable. There are two main subcategories of particulate matter – PM2.5 and PM10.