Prof. Chak K. Chan obtained BSc in Chemical Engineering from the University of Texas at Austin in 1986 and PhD in Chemical Engineering from the California Institute of Technology in 1992. He is Head and Professor of Division of Environment, Professor of Chemical and Biomolecular Engineering, and Director of the Institute for the Environment at the Hong Kong University of Science and Technology. Prof. Chan’s research interests include air pollution, aerosol science and atmospheric chemistry. Recently, he serves as Project Manager of the HKUST Air Quality Research Supersite, which is a research facility specializing in the real time measurements of particulate pollutants. He received Second Prize of the State Natural Science Award in 2010 and First Prize of the Natural Science Award in 2007, based on his work on PM2.5. He is Editor-in-Chief of Atmospheric Environment , an international journal focusing on air pollution and its societal impacts.