green roof
roof of a building that is partially or completely covered with vegetation and a growing medium, planted over a waterproofing membrane.
en-US/ˈɡɹin ˈɹuf/
en-GB/ˈɡɹiːn ˈɹuːf/
roof of a building that is partially or completely covered with vegetation and a growing medium, planted over a waterproofing membrane.