you can add polonium 210, an alpha emitter with a very short half life (lots of alpha particles in a very short time)that is a natural decay daughter of uranium...uranium (very long half life) is found with phosphate fertilizers (and if mom is there, the much quicker decaying daughter is also present)... when used as a tobacco fertilizer, residue can be vaporized at the burning tip...these gasified elements pass thru the lungs into the blood vessels... emitted alpha particles can scar the blood vessel lining causing a "rough" place for atherosclerotic plaque build up... don't smoke