We gathered exposure data on indoor air pollution and investigated the dose-response slopefactor for indoor air pollutants, such as volatile organic compounds, aldehydes and radon.Population cancer risks (that is the theoretical cancer deaths) were estimated from exposure tothe pollutants. In addition, the damage costs, due to their risks, were estimated usingwillingness to pay and value of a statistical life, which were investigated by a dichotomouscontingent valuation method.