Front Matter -- Preface -- Contents -- Summary -- 1 Introduction -- 2 Overview of Ambient-Ozone Standards Development and Benefits Assessment -- 3 Ambient Ozone and Related Pollutants -- 4 Contributions of Relevant Health Studies to the Estimation of Reductions in Premature Mortality -- 5 Economic Valuation of Reduction in Mortality Risk Associated with Ambient Ozone -- 6 Overall Conclusions and Recommendations -- References -- Abbreviations -- Appendix A: Biographic Information on Committee on Estimating Mortality Risk Reduction Benefits from Decreasing Tropospheric Ozone Exposure -- Appendix B: Environmental Protection Agency's Regulatory Impact Analysis for the Final Ozone National Ambient Air Quality Standard.