The Modern Green Roof Movement

The modern green roof movement grew out of ecologists in westburnin look in at these roofs that d vegetated. In the late 18 70 eightee eighties in berlin, there was a wet bitumin waterproofing which ws waser produced,. So to protect it from fire, they covered it in six centimeteres of sand adre called mis cartan ruse. All over berlin there were these sand roofs, you know, lovese. Not very many of them left now, because what happened in the second wars, berlin got pretty, pretty trashed. There's one in the grunvald on a water treatment censer. And that was built