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Sponges, Urban Forests and Air Corridors: How Nature Can Cool Cities
As China battles the twin challenges of rapid city growth and extreme weather, it is adopting a new tactic: turning its cities into giant sponges.
Thirty pilot cities in the country are trying to trap and hold more water to deal with such problems as flooding, drought, extreme heat and pollution.
The effort, launched by Chinese President Xi Jinping, relies on a range of innovations, such as green roofs on buildings and more urban wetlands. It is already being hailed as a bold step to...