congress cigarettes set to raise legal age to buy tobacco to 21 Congress bans airing cigarette ads,

This sequence in exclusion criteria ensured that the analysis was focused solely on individuals with a clear and exclusive use of either product, thereby eliminating confounding factors associated with dual use or non-standard nicotine consumption methods such as cigars and pipes

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They allow you to greatly reduce your pulmonary intake of toxins when you smoke

Masic A, Bibic D, Pikula B et al (2020) Evaluation of optical particulate matter sensors under realistic conditions of strong and mild urban pollution

(March 2016)