 Green roofs are an effective way to reduce urban heat island effects and provide a more comfortable living environment for urban residents. In this study, it was found that green roofs can reduce temperatures both on the roof and on the ground, as well as improve thermal comfort. Additionally, green roofs can extend the duration of cooler temperatures during the day, reducing the amount of time people spend exposed to extreme heat. This article was authored by C. Y. Jim and Liliana L. H. Bang.