For a brief few years Kent cigarettes has asbestos filters.
From March 1952 until at least May 1956, however, the Micronite filter in Kent cigarettes contained compressed blue asbestos within the crimped crepe paper, which is the most carcinogenic type of asbestos.
Nah. The planet has had way worse and will have way worse. We’re just an annoying itch you may never had known existed in just a few short tens of thousands of years; mere moments in Earth’s timeline.