Particulate matter(PM)

What is Particulate matter(PM)?

Particulate matter(PM) meaning in Science terminology / glossary / dictionary is:
Very small pieces of solid or liquid matter such as particles of soot, dust, fumes, mists or aerosols. The physical characteristics of particles, and how they combine with other particles, are part of the feedback mechanisms of the atmosphere. See aerosol, sulfate aerosols.


reference: Enviromental Protection Agency Unites States