I recall that I and my buddies would walk the streets in our neighbourhood when we were teenagers looking for cigarette ends that had been thrown away
Besides functional alterations, cigarette smoke causes important structural alterations to the respiratory epithelium
J Biol Chem 291:47634778 Tagawa Y, Hiramatsu N, Kato H, Sakoh T, Nakajima S, Hayakawa K, Saito Y, Johno H, Takahashi S, Gu L, Yao J, Kitamura M (2011) Induction of CCAAT/enhancer-binding protein-homologous protein by cigarette smoke through the superoxide anion-triggered PERK-eIF2alpha pathway
Wood Antique wooden cigarette case with an embossed metal lid pipe smoker motif Located in Wien, AT A charming antique wooden box that is ideal as a jewelry box, cigar or tobacco box, or decorative collectors item
Short answer: Scientists dont know much, but have raised red flags