KnowraElectronic cigaretteLinked fromLinked fromThe 9 pages that link to Electronic cigarette, each with the reason it gives.All 9Related 2Compared with 7NicotineRelated: Many devices deliver nicotine without burning tobacco, though their aerosols are not harmless.Propylene glycolRelated: Propylene glycol is a common carrier liquid in e-cigarette fluids.