Respiratory Effects
Cigarette smoke's toxins scar breathing passages and damage the lungs' alveoli, the air sacs that handle gas exchange. Smoke also causes respiratory passages to narrow, while also inflaming the larynx and trachea. The Environmental Protection Agency reports secondhand smoke can cause pneumonia and bronchitis in young children, as well as trigger asthma attacks, even in children who have never shown symptoms of the condition.
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