After more than two years living atop a most unusual home, the array of grasses, bulbs and perennials has been removed as a long research project on green roofs is coming to a close. The roof is empty ...

A green roof is any roof that uses living plant material as part of the buildingâÄôs roofing system, Corrie Zoll , a board member at the Minnesota Green Roofs Council, said. Green roofs are usually ...