ETS consists of both sidestream smoke released directly into the air from the burning core of tobacco and mainstream smoke that is exhaled by the smoker. The detrimental health effects of smoking are well-documented. Studies show smokers have a much greater risk of dying of lung cancer, coronary heart disease, and stroke.
Smoking appears to endanger the health of non-smokers too.
Numerous reports have linked ETS with an increased risk of lung cancer among non-smokers. ETS exposure can cause irritation of the eyes, nose, throat, and respiratory tract. In chemically sensitive individuals, these effects can be pronounced, particularly people with health problems such as emphysema, bronchitis, and pneumonia, or even just a common cold. The Joint Commission on Accreditation of Healthcare Organizations also has set standards to encourage health care facilities to maintain a smoke-free environment.