We gathered exposure data on indoor air pollution, and investigated the dose-response slope factor 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 to the pollutants. In addition, the damage costs, due to their risks, were estimated using WTP (willingness to pay) and VSL (value of a statistical life), which were investigated by a dichotomous contingent valuation method (DCVM). As a priority for human health risks and damage costs, management strategies are required for both radon and formaldehyde as indoor air pollutants. When the numeric results of human risks and damage costs are applied for other purposes, some assumptions and uncertainties have to be considered to use the results as useful screening tools for the administration of practical risk-based priorities.

Daily exposure of aflatoxin B₁ (AFB₁) was estimated in foods (rice, barley, soybean, peanut, soysauce, soybean paste) by ELISA (enzyme linked immunosorbent assay) using polyclonal antibody R_(101). Before ELISA, a simple extraction method was applied for the quantitation of AFB₁ in foods using chloroform which showed high recovery (70± 12%). AFB₁ levels in foods were 0.32 ng/ml (rice), 0.24 ng/ml (barley), 0.22 ng/ml (peanut), 0.30-0.78 ng/ml (soysauce), and 0.2 ng/ml (soybean paste). Based on food consumption, we estimated that Koreans were exposed to AFB₁ at the level of 1.86±0.46 ng/kg/day and liver cancer incidence attributed to AFB₁ exposure (assuming that AFB₁ as a single hepatocarcinogenic agent) might be calculated to be 13.1 per 100,000 population. Our data demonstrate that AFB₁ levels in foods were below the regulation of 10 ppb in foods and might not be the major risk factor for the high incidence of liver cancer in Korea.