Secondhand Smoke

Definition:
Secondhand smoke is the term used to describe tobacco smoke that comes from two sources:

• smoke that is exhaled by the smoker after puffing on a lit cigarette (mainstream smoke)

• smoke produced by a smoldering cigarette (sidestream smoke)

Secondhand smoke contains upwards of 4000 chemicals, including 200 known poisonous chemicals, and 60 carcinogenic chemical compounds.

See Also:

• Secondhand Smoke Facts

• Pesticides in Cigarette Smoke

• Secondhand Smoke at Home Threatens Children

Also Known As: ETS, second-hand smoke, second hand smoke