PM2.5 is mainly from industrial production, highway dust, construction dust and energy combustion used in human production and life, in addition to wind, sand, dust, forest fires and seawater spray from the natural world. About Pm2.5 Although fine particulate matter is only a small component of the earth's atmospheric composition, it has an important impact on air quality and visibility.
https://www.renkeer.com/air-qu....ality-monitors-choos
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