River deltas sinking rapidly, threatening millions of lives: Study

A major study reveals that many of the world's river deltas are sinking faster than sea levels are rising, increasing flood risks for millions. Driven by groundwater overuse, reduced sediment flow and urbanisation, regions like the Ganges-Brahmaputra, Nile and Mekong are severely affected. Researchers warn that over 236 million people could face rising coastal dangers.