Passive smoking is a health hazard because
- A. the smoke changes chemically once it leaves the smoker's lungs
- B. non smokers absorb nicotine through the skin
- C. it affects only people who are already ill
- D. sidestream smoke contains the same tar, nicotine and carbon monoxide, which bystanders inhale
Explanation
Smoke drifting from the burning tip is unfiltered and carries the same carcinogens, so people sharing the room inhale them and their risk of lung cancer and heart disease rises measurably. Children exposed at home suffer more asthma attacks and chest infections, and exposure during pregnancy lowers birth weight. This evidence is what public smoking bans are based on.
Related questions
Carbon monoxide is dangerous because it
The component of cigarette smoke responsible for addiction and for raising heart rate and blood pressure is
Lung cancer in smokers is caused mainly by
In emphysema the patient becomes breathless because
The persistent cough of chronic bronchitis in a smoker develops because