As China's urban areas continue to expand and develop, a concerning trend of sinking cities has emerged. The study highlighted in the journal Science indicates that a significant percentage of major Chinese cities are experiencing a gradual decline in elevation each year, with approximately 16% facing a loss of over 10 millimeters annually, and nearly half witnessing more than 3 millimeters of descent.

While on the surface, these measurements might seem small, the long-term implications are alarming. The accumulated effects of sinking cityscapes over the next century could lead to a substantial portion of China's urban coastal regions finding themselves submerged beneath sea level. This predicted scenario is attributed to the combined impact of subsidence caused by various factors and the ongoing rise in sea levels, posing a serious threat to the sustainability and safety of these urban areas. The study serves as a stark reminder of the urgent need for effective urban planning and environmental management to address these challenges and safeguard the future of China's rapidly growing cities.