Green roofs are the great green hope of many environmentalists, politicians, and architects interested in more efficient and environmentally aware buildings. From a design standpoint, however, there is less consensus. While some see the roof garden as a visual statement using plants, geometric lines, and sculptural elements, others believe concerns for sustainability should outweigh visual appeal. A green roof that combines aesthetics and mechanics has become the goal of many a landscape architect.
Chicago City Hall
Green roofs Rotterdam, The Netherlands | Urban green-blue grids
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Vancouver Public Library (Library Square Building)
You still have to water and weed a green roof. New green roofs should be watered until the plants are established, and it is important to weed green roofs several times a year to keep the plants healthy. Courtesy of the City of Chicago. The green roof on the Chicago City Hall building was installed as part of a Environmental Protection Agency study and initiative to reduce the urban heat island effect in the city and improve air quality.
In this context, Hamburg is the first German city to have developed a comprehensive Green Roof Strategy. The goal is to plant a total of hectares of green roof surface in the metropolitan area in the next decade. For Northern Germany, depending on the scenario considered, scientists forecast an average temperature rise of 2.