Tao Wang is a professor at the Department of Civil and Environmental Engineering of the Hong Kong Polytechnic University (PolyU). He received his PhD in Atmospheric Chemistry at Georgia Institute of Technology in 1992 and then conducted postdoctoral research at University of Michigan-Ann Arbor. His earlier work was field investigation of reactive nitrogen and ground-level ozone, in association with the SOS, NARE, and PEM-West programs. Since joining PolyU in 1995, he has initiated a number of field studies of trace gases, aerosol, and cloud composition in megacities, rural and remote regions of China mainland and Hong Kong. He has been involved in international studies including TRACE-P, ACE-Asia, China-MAP, and ABC. His recent research focuses on heterogeneous chemistry of reactive nitrogen (e.g. hydrolysis of denitrogen pentoxide) and the impact on radical budget and aerosol formation. He is an associate editor for Journal of Geophysical Research, a guest editor for Atmospheric Chemistry and Physics, and also on the editorial board of Journal of Atmospheric Chemistry and Atmosphere. He served as chief scientist for a China Key Basic Research Project on acid deposition during 2005-2010 and on the Engineering Panel of Hong Kong Research Grants Council in 2006-2010. He is an author of over 100 peer-reviewed scientific papers.