nicotine
ashtray
breathing
cancer
cancer case
cancer cell
cancer tissue
carbon dioxide
cigarette leaf manufacture
disease treatment
doctor
health
illness
inhale
internal medicine
internal organs
lung
lung cancer
medical treatment
medicine
nicotinism
non smoking mark
nonsmoking seat
oxygen
prohibition of smoking
respiratory organs
risk
smoker
smoking
smoking place
surgery
tar
tobacco
tobacco pouch
tobacconist
unhealthy