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Unlike standard purifiers that mainly rely on HEPA filters and ionizers, smoke eaters often combine advanced technologies like HEPA, Electrostatic Precipitation (ESP), activated carbon, and even UV light to target smoke at the source

"Japan Tobacco International: To 'be the most successful and respected tobacco company in the world'"

PMID 15941944

In that sense, choosing the 20 mg version would be roughly equivalent to consuming about 1320 cigarettes, while the 50 mg version would be closer to 3350 cigarettes in terms of absorbed nicotine

Four of the world's biggest tobacco firms wanted the plans overruled at the last minute