1. Emerging Issues and Opportunities for Air Quality Management
Jonathan M. Samet

3. New standards/guidelines are in place
New PM NAAQS in place for US; ozone NAAQS in progress
WHO guidelines published
Variety of European initiatives in progress

4. Scientific Evidence Provides Some Certainty on Some Matters
Acute and chronic effects of PM at current levels
Ozone has effects on morbidity and mortality, again at widely measured concentrations
Epidemiological evidence indicates that traffic exposure may be associated with diverse adverse health effects

5. Issues that have emerged
How to make further gains in developed countries?
What to do about the evidence on traffic?
More research? What research?
Sufficient warning to guide developing countries with rapidly increasing traffic?
More holistic frameworks for impact and accountability assessment?
Public engagement on health impact, climate change and environmental degradation?