Study estimates 900 square kilometres of land across five Indian megacities subsiding

Vast areas in New Delhi, Chennai, Mumbai, Kolkata, and Bengaluru are sinking. This land subsidence puts millions of people and thousands of buildings at risk. Excessive groundwater use and building weight are key causes. Experts warn of future disasters if infrastructure and water policies are not adapted. Over 23,500 buildings could face severe damage in the next 50 years.