Varenicline interferes with the nicotine receptors in the brain, which results in reducing the pleasure that you get from tobacco use, and decreases nicotine withdrawal symptoms
doi: 10.1093/ntr/ntx085 31
Food and Drug Administration says cigarette packs no longer can feature names such as light, mild, medium or low, which many smokers wrongly think are less harmful than full-flavor cigarettes
PMID 29543907
Mazzone concludes: If you smoke, never smoke inside your house because even if you dont smell the smoke anymore, its still there
Dyartanti ER, Jumari A, Paramitha T, Putri AYM, Sunaryati N (2022) Synthesis and characterization of cellulose acetate membrane from cigarette butts as gel polymer electrolytes for lithium-ion battery