 Green roofs are an effective way to reduce urban heat islands and provide better thermal comfort for people living in cities. In this study, researchers examined the impact of two types of green roofs, extensive and intensive, on neighborhood microclimate and human thermal comfort. They found that both types of green roofs can reduce temperatures near buildings and streets, and improve thermal comfort for people living nearby. Additionally, they found that green roofs can extend the cooling period during the day, reducing the amount of time people experience high levels of heat stress. This article was authored by C.Y. Jim and Liliana L.H. Peng.