In March 2011, EPA issued the Second Prospective Report which looked at the results of the Clean Air Act from 1990 to 2020. According to this study, the central benefits estimate exceeds costs by a factor of more than 30 to one. The report was updated in April 2011.
Below are the supporting technical reports for these components:
- Emissions
- Direct Cost
- Air Quality Modeling
- Health and Welfare Effects (including Economic Valuation)
- Hazardous Air Pollutant Case Study
- Uncertainty Analysis - draft report
- Macroeconomic Modeling - draft report
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.
- Emissions Projections for the Clean Air Act Second Section 812 Prospective Analysis Final Report (PDF)(414 pp, 3 MB, February 2011)
- Direct Cost Estimates for the Clean Air Act Second Section 812 Prospective Analysis (PDF)(327 pp, 2 MB, February 2011)
- Memorandum: Documentation of Second Prospective Study Air Quality Modeling (PDF)(206 pp, 3 MB, February 27, 2011)
- Health and Welfare Benefits Analysis to Support the Second Section 812 Benefit-Cost Analysis of the Clean Air Act (PDF)(164 pp, 3 MB, February 2011)
- Effects of air Pollutants on Ecological Resources: Literature Review and Case Studies, Second Section 812 Prospective Analysis Ecological Report – final report March 2011 (PDF)(183 pp, 4 MB, March 2011)
- Air Toxics Case Study - Health Benefits of Benzene Reductions in Houston, 1990-2020 and Appendices (PDF)(345 pp, 9 MB, July 2009)
- Uncertainty Analyses to Support the Second Section 812 Benefit-Cost Analysis of the Clean, final report March 2011 (PDF)(211 pp, 11 MB, March 2011)
- 812 Economic Analyses Using the EMPAX-CGE Modeling System: Revised Draft Report (PDF)(38 pp, 282 K, April 2010)