Imagine a sponge. Swipe it over a wet surface and it will draw up water; squeeze it and the water will trickle out. Now imagine a city made of sponges, or spongelike surfaces, able to soak up rainwater, overflowing rivers or ocean storm surges and release stored water during droughts. Engineers, architects, urban planners and officials around the world are seeking ways to retrofit or reconstruct cities to better deal with water — basically, to act more like sponges. While water management has always been an essential service in cities,…
Tag: Water
Terrawatch: what the world can learn from China’s sinking city
Fissures and sinkholes are the norm in China’s Shanxi province. Intensive agriculture combined with major coal production has put huge pressure on water resources and sucked the earth dry, leaving the city of Taiyuan, with a population of 5 million, and the surrounding area suffering some of the highest subsidence rates in the world. Pipelines, roads, bridges and railways need constant repairs, and gaping cracks in buildings have resulted in entire communities having to be rehoused. Since 2003, the Chinese government has been trying to solve this problem by diverting…
‘Ecological civilisation’: an empty slogan or will China act on the environment?
This week, China took charge of hosting a major UN environmental conference for the first time, at the opening of Cop15 in Kunming. The world’s biggest greenhouse gas emitter and largest consumer of natural resources might seem a strange choice to host talks to stop the destruction of ecosystems and mass extinctions of wildlife, but the conference marks a tipping point in China’s development and an international debut for “ecological civilisation”, a little-known phrase outside its borders with big implications for the planet. Amid uncertainty around whether President Xi Jinping…