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Abstract
A joint conference cosponsored for the sixth year by the Atmospheric Research and Exposure Assessment Laboratory (AREAL) of the U.S. Environmental Protection Agency and the Air & Waste Management Association was held in Durham, North Carolina, May 6–10, 1991. The technical program consisted of 220 presentations, held in 25 technical sessions, on recent advances in ambient and source atmospheres. Covering a wide range of measurement topics and supported by 78 exhibitors of instrumentation and consulting services, the symposium was attended by almost a thousand professionals from the United States and other countries. This overview highlights a selection of the technical presentations, and includes a synopsis of the keynote address.