Secondhand smoke is the smoke that is exhaled by a smoker or comes from the end of a burning cigarette, cigar, or pipe. It contains more than 7,000 chemicals, including hundreds that are known to be toxic and at least 69 that are known to cause cancer. Secondhand smoke exposure can cause a variety of health problems, including lung cancer, heart disease, stroke, and respiratory infections.
There are a number of things that can be done to combat secondhand smoke exposure, including: