Almost half of all major Chinese cities are sinking, study says

• Almost half of China's major cities are sinking, a new study has found.
• Around 45% of China's urban land is sinking faster than 3 mm per year.
• Water extraction is likely the main reason behind it, Robert Nicholls, a climate adaptation professor, said.

Almost half of China's major cities are sinking, putting millions of locals at risk of flooding, according to a new study published in the journal Science this week.

The study found that 45% of China's urban land was sinking faster than 3 mm a year, while 16% was sinking at a rate of more than 10 mm a year.