nicotine
addiction
anatomy
ash
background
bad
burned
burnt
cancer
care
chemical
chronic
cigarette
cigarettes
concept
danger
day
disease
flat
forbidden
habit
health
human
lay
lung
lungs
made
medicine
no
object
organ
paper
pollution
quit
quitting
risk
shape
shaped
smoke
smoker
smoking
stop
symbol
tobacco
top
toxic
tuberculosis
view
warning
white