what is the cause of tobacco Awareness and Prevention CDC - Fact Sheet -

Examples of chemicals in tobacco smoke include acetone (nail polish remover), acetic acid (hair dye), ammonia (household cleaner), arsenic (rat poison), benzene (rubber cement and gasoline), butane (lighter fluid), cadmium (battery acid), carbon monoxide (car exhaust), formaldehyde (embalming fluid), hexamine (barbecue lighter fluid), lead (batteries), naphthalene (mothballs), methanol (rocket fuel), nicotine (insecticide), tar (road paving), and toluene (paint manufacturing)

Former smokers were defined as ever smokers who currently did not smoke

4) The four phases of addiction and personal experiences: How can I stay away from cigarettes

IQOS cigarettes have more nicotine and more than six times as much tar per cigarette as Accord cigarettes