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SW: →EPA: Health and jobs benefits add up to $2 trillion by 2020: - add section
Most of the benefits (about 85 percent) are attributable to reductions in premature mortality associated with reductions in ambient [[particulate matter]]: "as a result, we estimate that cleaner air will, by 2020, prevent 230,000 cases of premature mortality in that year" (Introduction). The remaining benefits are roughly equally divided among three categories of human health and environmental improvement: preventing premature mortality associated with [[ozone]] exposure; preventing morbidity, including acute myocardial infarctions and chronic bronchitis; and improving the quality of ecological resources and other aspects of the environment.
According to the report: "The very wide margin between estimated benefits and costs, and the results of our uncertainty analysis, suggest that it is extremely unlikely that the monetized benefits of the CAAA over the 1990 to 2020 period reasonably could be less than its costs, under any alternative set of assumptions we can conceive. Our central benefits estimate exceeds costs by a factor of more than 30 to one, and the high benefits estimate exceeds costs by 90 times. Even the low benefits estimate exceeds costs by about three to one."
===2010 Harvard analysis===
Harvard Professor Dale W. Jorgenson, a dean of macroeconomic modeling, calculated that gross domestic product in 2010 was 1.5 percent higher because of the Clean Air Act of 1970, due to savings in health and environmental costs.<ref>[http://www.guardian.co.uk/environment/2011/nov/15/why-republican-attacks-environment-laws "Why Republican attacks on environment laws are flawed"] Guardian, Nov. 15, 2011.</ref>
==Recent political developments Clean Air Act ==
