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.
The report includes an Executive Summary which describes the study and its findings in more detail and nine technical appendices which provide in-depth documentation for each of the analytical components.
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- Benefits and Costs of the Clean Air Act Amendments of 1990 Fact Sheet (PDF)(2 pp, 344 K, 2011)
- The Benefits and Costs of the Clean Air Act from 1990 to 2020 Summary Report (PDF)(35 pp, 1 MB, 2011)
- The Benefits and Costs of the Clean Air Act from 1990 to 2020 (PDF)(238 pp, 4 MB, April 2011, Final Report – Rev. A)
- Graphics Stack for Section 812 Second Prospective Study (PDF)(12 pp, 515 K, April 2011)