This report presents the results of a systematic review of evidence of the health effects of black carbon (BC). The Task Force on Health agreed that a reduction in exposure to PM2.5 containing BC and other combustion-related PM material for which BC is an indirect indicator should lead to a reduction in the health effects associated with PM. The Task Force recommended that PM2.5 should continue to be used as the primary metric in quantifying human exposure to PM and the health effects of such exposure, and for predicting the benefits of exposure reduction measures. The use of BC as an additional indicator may be useful in evaluating local action aimed at reducing the population’s exposure to combustion PM (for example, from motorized traffic).
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