Cities account for 78% of the world’s energy consumption and produce more than 60% of global greenhouse gas emissions. Urban land use mix and density, transportation patterns, buildings energy usage, electrification, and renewable energy production are essential for GHG reduction.  Our research on climate change focuses on testing the effectiveness of various planning policies for GHG reduction. Such policies include building energy policy, climate action plans, district energy policy, land-based carbon sink preservation policy, and other climate policies designed for promoting energy efficiency and reducing GHG from the built environment. 

We work closely with civil and environmental engineers developing climate change mitigation technologies such as carbon-absorbing building materials and nitrogen recycling systems. Our research focuses on the life cycle assessment of such technologies and developing planning policy solutions to support the adoption of the technologies which could ultimately lead to expediting the decarbonization of our cities and regions.  

Land preservation has the benefits of securing parks and open space within built-up urban and suburban areas, producing food and natural vegetation for wildlife habitats, protecting source water, and sinking carbon. Promoting compact and efficient land uses can mitigate the costs of sprawl including dependency on automobile and imported oil, air and water pollution, GHG emissions, and extensive infrastructure provision costs. We study the effectiveness of various growth management policies (e.g., Greenbelt, Smart Growth) to promote sustainable urban growth and land preservation including carbon sinks in different parts of the world. 

Waste incinerators, power plants, and landfills are essential urban infrastructure, yet they are known as locally unwanted land uses (LULUs) because of their negative impacts on the environment and public health. Because these LULUs are often disproportionately located in disadvantaged neighborhoods, they indirectly generate social stigmas. Our research focuses on identifying environmental injustice cases using spatial and statistical analyses, and developing planning and policy solutions to protect vulnerable communities from the adverse impacts of LULUs. 

The emergence of online platforms and big data has transformed planning and policy-making to be more accessible, inclusive, and transparent. Effective communication using online platforms can better inform our communities, make public participation accessible and inclusive, enhance planners' capacity to engage communities, and inform decision-makers to better address the needs and wants of the communities. Our research focuses on developing/utilizing online platforms (e.g., Twitter, Facebook, webpages, and apps) to collect and analyze communication data, and deriving useful planning implications to inform our communities, planners, and decision-makers.