Smash Notes

What Is the PM25 Pollution Measurement

From the episode: Air Pollution: an Unclear and Present Danger

PM 2.5 refers to the size of the particle 2.5 microns in size. It is very, very tiny, and completely invisible. These particles have very powerful health impacts as they penetrate all the way into our bodies.

Science Talk · Air Pollution: an Unclear and Present Danger · at 15:33 · ·Transcript

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