Dr. Tie Zheng is a Postdoctoral Scholar in the Department of Earth System Science at Stanford University. He received his Ph.D. in Environmental Science and Engineering from Tsinghua University. His research focuses on air pollution monitoring, mobile sensing, traffic-related emissions, indoor air quality, exposure assessment, and the health impacts of air pollution. He has conducted large-scale mobile monitoring studies to characterize hyperlocal variations in air pollution and has developed data-driven methods for improving spatial exposure assessment. His current research examines gaseous and ultrafine particle emissions from residential gas stoves and their implications for indoor exposure and public health. His work has been published in peer-reviewed environmental science journals, including research on cost-effective mapping of hyperlocal air pollution.