what is SPM ? Mention its two types

Dear student,
Suspended particulate matter (SPM) are finely divided solids or liquids that may be dispersed through the air from combustion processes, industrial activities or natural sources.
  • Inhalable coarse particles: The diameter size of the particles range from 2.5 to 10 micrometers.
  • Fine Particles: Usually found in haze and smoke and the size can range up to 2.5 micrometers.



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Particulate matter present in the air is mainly of two types- Viable particles and non-viable particles. Viable Particulate Matter: These particles include lower living organisms such as algae, bacteria, molds, fungi, etc. They are dispersed into the air.
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