pm2.5 cigarette smoke The haze outside isn't "just" smoke. It's made up of tiny particles called PM2.5. This is particulate matter that is 2.5 micrometers or smaller. These particles are so small that about 30 Particulate matter air pollution as
Particulate matter air pollution as a cause of lung cancer: epidemiological and experimental evidence British Journal of Cancer 22 micrograms of PM2.5 equivalent to smoking a cigarette: Health experts The Statesman Low cost PM2.5 Sensors: An Assessment of their Suitability for Various Applications Aerosol and Air Quality Research Chemical Dissection of PM2.5 in Cigarette Smoke: Main and Sidestream Emission Factors and Compositions
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