10.2190/7EP1-BBG6-D31T-0P8T 7EP1BBG6D31T0P8T 1 Costs Inherent in use of Sub-Optimal Measures of Air Quality 1 19 20020509 20020509 20020509 20020509 7EP1BBG6D31T0P8T.pdf http://baywood.metapress.com/link.asp?target=contribution&id=7EP1BBG6D31T0P8T 1 John S. Evans Patrick L. Kinney Department of Environmental Science and Physiology School of Public Health, Harvard University Atmospheric aerosols are thought to produce many classes of effects, e.g., morbidity, mortality, property damage. It would be possible to specify a unique theoretically optimal metric for each class of effects. Alternatively a single surrogate metric could be used to represent the combined impact of all classes of effects. Here, the impacts of using surrogates in establishing ambient air pollution standards are explored. 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