is a suspension
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 dust, fire fighter, smog, tobacco.