Some indoor air pollutants can kill. Among the most dangerous are these three:
- Carbon monoxide: 400 die and thousands are sickened annually.
- Secondhand smoke: 7,500-15,000 children are hospitalized or sickened with respiratory tract infections, and older adults with cardiovascular or lung illness are at higher risk of health problems.
- Radon gas: It's silent. It's odorless. It's found in many American homes, and it is the second biggest cause of lung cancer, after cigarette smoke.
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