FIGURE S-1 Comparison of growth areas and emission trends. Note that the trends in the graph (except for aggregate emissions) did not change substantially in 1995; only the scale of the graph changed. SOURCE: EPA 2002a.

plex set of responsibilities and relationships among federal, state, tribal,2 and local agencies for implementing the CAA. This is essentially the nation’s air quality management (AQM) system.


The Committee on Air Quality Management in the United States was formed by the National Research Council in response to a congressional request for an independent evaluation of the overall effectiveness of the CAA and its implementation by federal, state, and local government agencies. The committee was asked to develop scientific and technical recommendations for strengthening the nation’s AQM system. In response to its charge,3 the committee examined in detail the operation, successes, and limitations of the many components of the nation’s AQM system and developed a set of unanimous findings and recommendations, as discussed below and outlined in Figure S-2.


Hereafter, “state” will be used to denote both state and tribal authorities.


See Chapter 1 for a discussion of the committee’s approach to carrying out its charge.

The National Academies of Sciences, Engineering, and Medicine
500 Fifth St. N.W. | Washington, D.C. 20001

Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement