Liya E. Yu is an Associate Professor in the Department of Civil & Environmental Engineering at the National University of Singapore (NUS). Her research group characterizes effects of semi-volatiles and photooxidation on physicochemical properties of ambient particulates, impacts of cross-border biomass burning smoke on urban air quality, behavior of secondary aerosols and transient new particle formation in warm humid tropical urban environment. She also works with her colleague at NUS to investigate personal exposure to airborne pollutants and mitigation of airborne pollutants by employing building envelope in large cities. She serves on advisory boards, editorial boards, working groups, and steering committees for international scientific journals and research communities. She received her PhD degree in Environmental Engineering from Stanford University.