The National Air Pollution Symposium was held on November 10-11, 1949 in Pasadena, California by the Stanford Research Institute (now SRI International ), along with assistance from the California Institute of Technology , the University of Southern California, and the University of California . 
SRI had performed much of the early research on air pollution and the formation of ozone in the lower atmosphere.  About 400 scientists, businessmen, and politicians attended the event, which was the first event of its kind. The conference (and subsequent conferences) spurred some of the early pollution and climate change research, including the Air Pollution Control Act of 1955. 
- Jump up^ “The First National Air Pollution Symposium” . SRI International . Retrieved 2012-08-27 .
- Jump up^ Nielson, Donald (2006). A Heritage of Innovation: SRI’s First Half Century . Menlo Park, California : SRI International. pp. 9-18 – 9-21. ISBN 978-0-9745208-1-0 .
- Jump up^ Gibson, Weldon B. (1986). SRI: The Take-Off Days . Los Altos, California : Stanford Research Institute. pp. 48, 55, 149, 168, 181. ISBN 0-86576-103-5 .