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Last Thursday, France passed legislation that new commercial buildings are required to have green roofs.
In order to decrease the environmental impact of new construction, new buildings in commercial zones must have either rooftop plants or solar panels. These rooftop gardens not only insulate the building with their thermal mass, but they also filter water and help prevent excess runoff and storm water overflows.
France is not the first government to legislate green roofs. In 2009, The City of Toronto began requiring some new buildings to include rooftop planting in their design, and in Switzerland, all buildings must have a green roof if they have a suitable pitch...
Via Lauren Moss
En France, les nouveaux immeubles commerciaux doivent dorénavant avoir des toits "verts" : végétalisés ou avec panneaux solaires.