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Nov 27, 2015 · Particulate matter (PM2.5), refers to particles in the air that cause pollution. These particles are from a variety of sources, both indoors and outdoors. Even at moderate levels, it can still be harmful to sensitive people and the use of a pollution mask is recommended. Though the atmosphere will always have PM2.5, certain levels are ...

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Jun 05, 2018 · Exactly How bad is PM2.5 in different parts of the world? The internet is a treasure trove for real time data on air quality around the world and there are a few sites such as Berkeley Earth or AQICN, which both show detailed maps describing particulate matter air pollution less than 2.5 microns in diameter constructed from thousands of surface station measurements from around the world.

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respirator - Newegg

5Pcs Pm2.5 KN95 Face Mask N95 Earloop Face Mask for Personal Protective Respirator. Size/Dimensions One Size; Color/Finish White; Model # BEDDWS-ZCBI0571lot5; Item # 9SIA7UMB969640; Return Policy View Return Policy $

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