What is the difference between PM2.5 and PM10 with respect to the atmospheric pollutants?

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According to my laser particle counter, the number of particles in t he 2.5 micron size range is typ… Read more »

Peter

The following statement is made in the article: “…That is the “smaller than” piece. Each… Read more »

Noam

Ok, I found this paper which gives the following definition: (Taken from the 2016 paper: “Beyo… Read more »

Noam

If PM10 particles are defined as particles with a diameter below 10 microns, does a PM10 reading also include the PM2.5 fraction (because PM2.5 is lower than 10 microns…)? the fact that PM2.5 can sometimes be higher than PM10 suggest that PM10 are not just particles below 10 microns, rather probably particles below 10 microns and *above* 2.5 microns… Is this right?