Nicotine
Cigarette ends remind you that you're fast approaching a stage where you could get lung cancer.
Over 1,000 different substance all in them
carcinogen
The adds by cigarette companyhave been banned as it causes cancer and to warn the public.
mutation, it causes cells to reproduce abnormaly fast, creating tumors
Cigarette produces a certain amount of a substance called tar in our lungs which causes cancer. After an year this tar becomes so much in amount that it can cause any disease in our body
A somewhat satirical synonym for cigarette is cancer stick.
Lung Cancer or Heart Disease or Strokes and a variety of other cancers
That would be the nicotine in the cigarette. this answer sucks
lung cancer
cancer sticks