Smoke is a
suspension in
air of small particles resulting from incomplete
combustion of a
fuel. It is commonly an unwanted by-product of fires, but may also be used for
pest control[?], communication (
smoke signals) or
inhalation[?]. Controlled combustion normally takes place in closed containers (such as
engines,
stoves[?] and
lamps) and the exhaust smoke is released through a
chimney or
exhaust pipe.
Smoke inhalation is a common cause of death in victims of indoor fires. The smoke kills by a combination of thermal damage, asphyxiation and pulmonary irritation.
See also fire fighter, smog, tobacco.