- Secondhand smoke, also known as environmental tobacco 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.
Health Effects of Secondhand Smoke Exposure
- Secondhand smoke exposure causes heart disease and lung cancer in nonsmoking adults.
- Nonsmokers who are exposed to secondhand smoke at home or work increase their heart disease risk by 25