If the roof of a building is covered with plants and grass then it is a green roof building. It is also known as living roof and rooftop garden. Sometimes the roof of a building is partially covered with vegetation and sometimes it is completely covered https://naples-roofing.com/blog/2020/1/30/what-is-a-green-roof-types-of-green-roof-amp-benefits-of-green-roofing