Professor Dennis Y.C. Leung is currently a full professor of the Department of Mechanical Engineering at the University of Hong Kong specializing in environmental pollution control and clean energy development. He has published more than 400 articles in this area including 220+ peer reviewed top SCI journal papers. He was invited to publish more than 20 review articles in leading journals. His current h-index is 54 with total citations more than 15,000. He is one of the top 1% highly cited scientists in the world in energy field since 2010 (Essential Science Indicators) until now. Professor Leung has delivered more than 50 keynote and invited speeches in many conferences as well as public lectures. He serves as a chief editor or editorial board member of a number of journals including Frontiers in Environmental Sciences, Applied Energy, Journal of Power & Energy, just name a few.