Passive smoking is a health hazard because
Correct answer: D. sidestream smoke contains the same tar, nicotine and carbon monoxide, which bystanders inhale
- 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.
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About Effects of Smoking
Smoking exposes the respiratory system to nicotine, tar and carbon monoxide, damaging cilia, reducing oxygen transport and narrowing or inflaming airways. The topic covers dependence, chronic bronchitis, emphysema, lung cancer and cardiovascular effects, while separating short-term physiological changes from long-term disease.
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