Gai Yijun

      GAI YIJUN 蓋怡君

      PhD Student (Admitted in 2021 – 2022)
      Field Area: Humanities and Social Sciences


      Before starting the PhD Program at the University of Hong Kong (with the Southern University of Science and Technology), Yijun received her bachelor’s and master’s degree in environmental engineering at the University of Toronto, during which she conducted life cycle assessment on renewable energy systems to evaluate their impacts on air quality, climate change, and human health.

      After receiving her master’s degree, she worked for environmental NGOs to enhance air quality and climate policies. In the meantime, she has developed an interest to find the root cause of environmental issues and how people have been involved in creating and addressing those issues.

      Therefore, her tentative PhD project is a case study on renewable energy systems to explore its history of development and its role in establishing an ecological civilization. This will be an interdisciplinary study involving sociology, history, political science, environmental philosophy, environmental ethics, environmental engineering, etc.


      G09, May Hall, The University of Hong Kong
      Tel: (852) 3917-5909
      Fax: (852) 2559-6143

      Research Interests

      Environmental ethics and philosophy; History of renewable energy development; Science, technology, society, and environment; Ecological civilization

      Thesis Project

      [tentative] A study on solar photovoltaic systems in China with the STSE (science, technology, society, and environment) Approach

      Selected Publications

      Journal Papers (first author)

      2020 Gai, Y., Minet, L., Posen, I. D., Smargiassi, A., Tetreault, L., & Hatzopoulou, M.* (2020). Health and climate benefits of Electric Vehicle Deployment in the Greater Toronto and Hamilton Area, Environmental Pollution. 265, p. 114983.

      2019 Gai, Y., Wang, A., Pereira, L., Hatzopoulou, M., & Posen, I. D.* (2019). Marginal greenhouse gas emissions of Ontario’s electricity system and the implications of electric vehicle charging. Environmental Science & Technology, 53(13), 7903-7912.

      Journal Papers

      2020 Wang, A., Tu, R., Gai, Y., Pereira, L. G., Vaughan, J., Posen, I. D., Miller, E. J., & Hatzopoulou, M.* (2020). Capturing uncertainty in emission estimates related to vehicle electrification and implications for metropolitan greenhouse gas emission inventories. Applied Energy, 265, 114798.

      2020 Minet, L., Chowdhury, T., Wang, A., Gai, Y., Posen, I. D., Roorda, M., & Hatzopoulou, M.* (2020). Quantifying the air quality and health benefits of greening freight movements. Environmental Research, 183, 109193.

      2020 Tu, R., Gai, Y., Farooq, B., Posen, I. D., & Hatzopoulou, M.* (2020). Electric vehicle charging optimization to minimize marginal greenhouse gas emissions from power generation. Applied Energy, 277, 115517.

      2018 Wang, A., Stogios, C., Gai, Y., Vaughan, J., Ozonder, G., Lee, S., Posen, I. D., Miller, E. J. & Hatzopoulou, M.* (2018). Automated, Electric, or Both? Investigating the Effects of Transportation and Technology Scenarios on Metropolitan Greenhouse Gas Emissions. Sustainable Cities and Society, 40, 524-533

      Thesis Supervisors