FIGURE 2–1 Framework for informing airborne-PM management.

science. The assessment, however, often lacks a clear discussion of how the material presented could be useful for informing PM policy decisions. The committee recommends that each technical chapter (Chapters 2–9) conclude with a synthesis of how the scientific information presented could be used in managing PM. Such a “policy implications” section should follow the technical summary at the end of each chapter.

Another issue is that the assessment focuses much less on airborne PM in Mexico than on that in Canada and the United States. The assessment includes only one Mexican location—the Mexico City area—in its regional descriptions, although information on PM in other areas of



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