A green roof is a way of finishing the surface of a roof that allows planting and growth of vegetation. Green roofs contribute to increasing the biologically active area and are one of the tools used to adapt and reduce the effects of climate change in cities. By cooling and humidifying the air, they reduce urban heat islands, improve air quality, perform an insulating function by increasing the energy efficiency of buildings, and increase rainwater retention. Green roofs provide a habitat for birds and insects, and serve a variety of social activities, including gardening and recreation. As part of the conducted research, the CoAdapt UW team developed a catalog of “green roofs”. The catalog is the result of field visits to Paris, Copenhagen, Oslo, New York, Boston and Philadelphia (May, June, August, September 2022).