Scientific and technical bases of current approaches used to set technology-based standards, emission standards, and ambient air quality standards;

Scientific and technical bases of current approaches for developing and implementing air quality management plans, including procedures for developing emissions inventories, models for evaluating management strategies and relating emissions to air quality; and the State Implementation Plans and other air quality management programs;

Measures of performance used to determine progress toward public health and environmental goals, and the use of these measures to modify management systems as needed;

Potential for new scientific concepts and methods, such as those related to human exposure assessment, intermedia transfer, and source-receptor modeling, to be utilized more effectively in the management of air quality;

Scientific and technical aspects of policies and tools (e.g., emissions trading) for air quality management;

Balance between the need for national consistency and the need for local flexibility in carrying out the major air quality provisions of the Clean Air Act;

The extent to which one can rely on anticipated technological advances for achieving emissions reductions in SIPs and other air quality management plans;

Adequacy of current and future expertise, resources, and infrastructure at federal, state, and local agencies to implement air quality management programs;

The effectiveness of federal research programs to enhance the nation’s capacity to manage air pollution.