If your city is sinking, why not make it float?

MANY of the world’s largest coastal cities are sinking at alarming rates due to factors such as groundwater extraction and the weight of built infrastructure.

A potential solution is moving their residents to floating cities, if they can be built without creating a damaging ecological footprint in the ocean.

The issue of land subsidence, or sinking, is not a new one. Vertical subsidence of up to 9 m has been observed in coastal areas during the 20th century.