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There's a related story on Berlin being built into a sponge city. https://www.bloomberg.com/news/videos/2017-08-18/sponge-city-making-berlin-cooler-video https:

• baldfat 9y ago
  I think Berlin's approach is better for colder climates. It just makes sure the water lands in soil and stays there. Each new construction site must do the same. So the roofs are green with soil and the road's water goes into the soil and the buildings have a layer of soil on top of underground garages.