What is PM (Particulate Matter)?
Particles released into the air in the form of fine liquid or solid particles such as dust, smoke, mist, fumes or smog. Fine particle pollution or P.M. 2.5: Refers to particulate matter that is 2.5 microns in size or smaller. On average PM 2.5 is 1/30th the diameter of a human hair. These particles are harmful because they are small enough to get trapped deep inside of your lungs and/or bloodstream causing respiratory or cardio problems including reduced lung function, the development of chronic bronchitis, and even premature death. Fine particles; include all types of combustion activities (motor vehicles, power plants, wood burning etc.) and certain industrial processes. Coarse particle pollution: is made up of particles that are larger than 2.5 microns but no larger than 10 microns. These particles are harmful because they are known to exacerbate asthma, aggravate lung disease, irritate the eyes, nose, throat and may also increase susceptibility respiratory infections. Coarse partic
