The pollutants listed in this guide have been shown to cause the health effects mentioned. However, it is not necessarily true that the effects noted occur at the pollutant concentration levels typically found in the home. In many cases, our understanding of the pollutants and their health effects is too limited to determine the levels at which the listed effects could occur. No immediate symptoms. Estimated to contribute to between 7,000 and 30,000 lung cancer deaths each year.
Smokers are at higher risk of developing radon-induced lung cancer.
Particle levels in homes without smokers or other strong particle sources are the same as, or lower than, those outdoors. Homes with one or more smokers may have particle levels several times higher than outdoor levels. Do not smoke if children are present, particularly infants and toddlers. If smoking indoors cannot be avoided, increase ventilation in the area where smoking takes place. Open windows or use exhaust fans.