CIIC:Today's featured article/May25, 2012
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Revision as of 06:03, 25 May 2012 by imported>Ciic
Particulate matter, or PM, is the term for particles found in the air, including dust, dirt, soot, smoke, and liquid droplets. PM2.5 particles are air pollutants with a diameter of 2.5 micrometers or less, small enough to invade even the smallest airways. (More...)
