The Air Quality Index / Cigarette equivalence is based on the increased number of deaths from each.
One cigarette is equivalent to an air pollution of 22 μg/m3 for one day. Thus, an AQI of Particles (PM2.5) of 160 (today in San Francisco) is equal to 160 / 22 = about 7 cigarettes.
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[ 3.4 ms ] story [ 10.5 ms ] threadOne cigarette is equivalent to an air pollution of 22 μg/m3 for one day. Thus, an AQI of Particles (PM2.5) of 160 (today in San Francisco) is equal to 160 / 22 = about 7 cigarettes.