Nature and EnvironmentSponge cities: Keeping stormwaters at bay04:07This browser does not support the video element.Nature and Environment12/16/2021December 16, 2021Flash-flooding caused by climate change threatens many cities. Drainage systems can’t cope with worsening deluges. A water management model devised to turn cities into sponges could help cities like Bangkok and Berlin.Copy linkAdvertisementImage: DW