Particulates

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[edit] Definition

Particulates are little particles that float around in the atmosphere. They can either be solid or semi-solid. We usually see this in terms of haze or smog.

[edit] Where Do They Come From?

* wind blown dust particles from roads, fields and construction
* coal dust, fly ash, and combustion from various combustion sources
* automobile exhaust

[edit] Particle Size

  • less than 0.1 micrometer up to 45 micrometers: total suspended particles
  • larger particles seem to not remain suspended in the air

[edit] Is it Bad for You?

  • The nose filters out roughly 99% of particulate matter
  • Can cause respiratory problems as well as Lung Cancer

--Pmthomas99 13:51, 10 October 2007 (PDT)

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