FUTURE-RESEARCH NEEDS ASSOCIATED WITH THE ASSESSMENT OF POTENTIAL HUMAN HEALTH RISKS FROM EXPOSURE TO TOXIC AMBIENT AIR-POLLUTANTS

This paper presents key conclusions and future research needs from a W orkshop on the Risk Assessment of Urban Air, Emissions, Exposure, Risk Identification, and Quantification, which was held in Stockholm durin g June 1992 by 41 participants from 13 countries. Research is recommen ded in the areas of identification and quantification of toxics in sou rce emissions and ambient air, atmospheric transport and chemistry, ex posure level assessment, the development of improved in vitro bioassay s, biomarker development, the development of more accurate epidemiolog ical methodologies. and risk quantification techniques. Studies are de scribed that will be necessary to assess and reduce the level of uncer tainties associated with each step of the risk assessment process. Int ernational collaborative research efforts between industry and governm ent organizations are recommended as the most effective way to carry o ut this research.