According to scientific research, there is a risk of developing oral cancer called squamous cell carcinoma from such cysts, but this is very rare
If there was a reliable method of extrapolating the effects of tobacco industry on pollution and the environment its likely that government spending related to it could number in trillions of dollars on a global scale.
References & Further Reading The Chemical Constituents in Cigarettes & Cigarette Smoke J Fowles et al The Chemistry & Toxicology of Cigarette Smoke US Department of Health & Human Services Student Guide to Chemicals in Cigarette Smoke SBCTC Application of Toxicological Risk Assessment to the Chemical Constituents of Cigarette Smoke J Fowles, E Dybing.
Regardless of your preference, it's best to find a chewing tobacco alternative that provides you with a variety of different options, and doesn't sacrifice quality or your health in the process
& Tibshirani, R
Sometimes the tin's appearance elicits moral outrage (one friend, the daughter of a dental hygienist, asks, "Are you doing an article on getting gum cancer?"), but just as often, it simply causes confusion