Your city isn’t prepared for what’s coming. The classical method for dealing with stormwater is to get it out of town as quickly as possible, with gutters and sewers and canals. But more and more, that strategy is breaking down: As the atmosphere warms, it can hold more moisture, spawning ever-wetter storms that overwhelm this creaky infrastructure. Your city was built for a climate of 100, 200, 300 years ago, but that climate no longer exists.
The hot new strategy in urban design, which was pioneered in China, is to slow everything down. Since 2013, China has embarked on a national policy to turn its growing metropolises into sponge cities,
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