Pollution is the by-product of industrialization and urbanization. Growing numbers of cities and surrounding environments throughout the world have now suffered from issues such as air, water, and waste pollution, among many other environmental problems. Clean and healthy urban environments are the critical and essential elements of quality living. In order to develop a sustainable society, it is important to understand and apply new technologies to tackle these pollution problems. This course is designed to enable students to develop a broader perspective and critical understanding of the current pollution issues related to urban environments, as well as to identify possible solutions to these environmental problems based on sound scientific understanding. The comprehensive course contents consist of environmental health and toxicology, food safety and security, air pollution and health effects, climate change, water pollution and resource utilization, wastewater treatment and management, integrated solid waste management, and future sustainable development/environmental ethics. Case studies on Hong Kong and Greater Bay Area environments will also be covered to help students gaining more understanding of the local environments. The major learning activities include lectures, tutorials, and projects.