My research focuses on the interactions between climate and air quality, and the resultant impacts on human health and planetary health. My on-going research is to develop, advance and utilize the state-of-the-art multi-scale atmospheric models, along with measurement and statistical approaches, to understand the mechanisms that drive the climate-air quality interactions, and evaluate the impacts on human heat and air pollution exposure, mosquito abundance, the resultant diseases. Particular interests are in investigating air quality impacts of sectoral emissions and transboundary air pollution at multiple spatial scales, studying regional climate change due to land-use changes and global climate change, and evaluating and quantifying the effects of air pollution on respiratory and cardiovascular diseases. My research also assesses and develops emission control scenarios to provide scientific-based policy solutions for a sustainable environment in present and future years.