There is growing concern for environmental conservation and sustainable development across the globe. To achieve long-term environmental sustainability requires innovative solutions to many problems caused by human to the aquatic, atmospheric and land environments – problems ranging from micropollutants in drinking water, noxious aerosols and fumes in air, to heavy metals and toxic organics in solid wastes that will overwhelm our landfills. The scarcity of water resources, the ever-deteriorating air quality in many metropolises, the threat of mounting volumes of waste without suitable disposal sites, and a long list of other critical issues must be resolved through the innovations of scientists and engineers. Environmental problems are essentially interdisciplinary issues including the physical process of mixing and dilution, chemical and biological processes, mathematical modeling, data acquisition and measurement, to name but a few. The Environmental Engineering (EVNG) Program offered by the School of Engineering at the Hong Kong University of Science and Technology (HKUST) is one of the most successful interdisciplinary research programs in this field of study. The faculty members are the leading experts committed to innovative research in a broad range of environmental engineering areas. The EVNG Program covers a comprehensive curriculum that provides a solid foundation on which students may work on research studies.