美国环境保护局(EPA)修订的评估环境化学致癌物危险性的导则称儿童比成人更易受环境致癌物影响.该导则基于化学物质致癌机理而对致癌物管理做了不同处理.此前,EPA的缺失假设是致癌物的危险性和接触剂量呈线性关系,现在EPA准备放弃这一假设. 预期该导则将于2003年年中生效.根据 The United States Environmental Protection Agency (EPA) revised guidelines for assessing the risks of environmental carcinogens in the environment say that children are more susceptible to environmental carcinogens than adults and that the guidelines deal with carcinogens differently based on the carcinogenic mechanism of chemicals, The EPA’s assumption of absence is assumed to be a linear relationship between the risk of carcinogen and exposure dose, and the EPA is now ready to abandon this assumption. It is expected that the guideline will enter into force in mid-2003.