Professor Hwong-wen Ma teaches at the Graduate Institute of Environmental Engineering (GIEE), National Taiwan University. Prof. Ma obtained his PhD degree at the Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, USA. He had served as the Director of GIEE and Secretary-General and Chair of Environmental Planning and Management Committee, Chinese Institute of Environmental Engineering. Prof. Ma’s research focuses on the development of integrated environmental assessment models, which involve the combination of tools including material flow analysis, life cycle assessment, risk assessment, and economic analysis. The methods are applied to strategic environmental assessment, energy policy planning, sustainable resource management and sustainable cities, with purpose of depicting transition paths to sustainability. Prof. Ma also works with the industry and form platforms of circular economy by which knowledge and skills are integrated to catalyze innovation and transformation.