PAUL WHITEHILL / SCIENCE PHOTO LIBRARY PAUL WHITEHILL / SCIENCE PHOTO LIBRARY
Passive smoking. Mother holding a lit cigarette over an ashtray while holding her young daughter. Inhalation of tobacco smoke by passive smoking is implicated as a major cause of asthma in children. It can also cause other respiratory problems such as wheezing, bronchitis, and lung cancer. Children exposed to passive smoking may be more likely to become smokers themselves.
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