A green roof is a roof that is partially or completely covered with vegetation and soil, or a growing medium. It often includes a waterproofing layer and a drainage system to manage water. Green roofs can help reduce energy costs by providing insulation, improve air quality, and manage stormwater runoff. These roofs can be found on residential, commercial, and public buildings, contributing to urban biodiversity. They also create green spaces in cities, which can enhance the aesthetic appeal of buildings and provide habitats for wildlife. Overall, green roofs promote sustainability and environmental health in urban areas.