How is second-hand smoke bad?
• Secondhand smoke is associated with an increased risk for lung cancer and coronary heart disease in nonsmoking adults. Secondhand smoke is a known human carcinogen (cancer-causing agent). • Young children are particularly susceptible to secondhand smoke because their lungs are not fully developed,. Exposure to secondhand smoke is associated with an increased risk for sudden infant death syndrome (SIDS), asthma, bronchitis, and pneumonia in young children.