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Smoking cannabis can put more PM2.5 in air than a cigarette #airqualitymatters #secondhandsmoke 22 micrograms of PM2.5 equivalent to smoking a cigarette: Health experts The Statesman Is air pollution worse than smoking? AQI equivalent to cigarettes Molekule 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 Measuring PM2.5 concentrations from secondhand tobacco vs. marijuana smoke in 9 rooms of a detached 2 story house ScienceDirect

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