- Secondhand smoke is a complex mixture of gases and particles that includes smoke from the burning cigarette, cigar, or pipe tip (sidestream smoke) and exhaled mainstream smoke.
- Secondhand smoke contains at least 250 chemicals known to be toxic, including more than 50 that can cause cancer.
- Secondhand smoke exposure causes heart disease and lung cancer in nonsmoking adults.
- Breathing secondhand smoke has immediate harmful effects on the cardiovascular system that can increase the risk of heart attack.
- The California Environmental Protection Agency estimates that secondhand smoke exposure causes approximately 3,400 lung cancer deaths and 22,700–69,600 heart disease deaths annually among adult nonsmokers in the United States.
- Secondhand smoke exposure causes respiratory symptoms in children and slows their lung growth.
(www.cdc.gov)
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