formaldehyde, benzo{a}pyrene, and toluene are all found in cigarette smoke n all are known carcinogens.
nicotine, carbon monoxide, hydrogen cyanide, ammonia, arsenic, benzene, beryllium, 1,3-butadine, cadmium, chromium, ethylene oxide, nickel, polonium-210, vinyl chloride,
I can't add any more signs x3 It's got DDT in it, too.
Add the fact that it contains rocket fuel and paint. I think cigarettes contain them anyway. :P
down with cigars and cigarettes!