This course aims to provide the students with a basic understanding of key concepts and methodologies concerning urban sustainability and enhance their ability to address actual urban sustainability issues by incorporating environmental, technological, social, cultural, economic and policy dimensions. The students will work together in teams on major urban sustainability challenges in Hong Kong, including air pollution, energy, water, housing, and waste management. The students participate in lectures by researchers in academia and field trips and on-site discussions with practitioners in industry and the public sector. At the end of the course each group makes a poster presentation demonstrating their understanding of the structure of the urban sustainability challenge that they have chosen and proposes a policy-focused solution considering the complexity nature of the challenge.