The world’s biggest cities are sinking. Is yours one of them?

Global cities are subsiding by up to several inches a year, an exhaustive new survey shows

一项覆盖全球465个百万人口城市的研究发现，地面下沉是普遍存在的全球性城市问题，主要驱动因素是地下水抽取。东京、北京等地通过限制开采和改用地表水已成功遏制下沉，说明多数地方仍有时间应对。