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CAN THO (AFP) – One summer morning, Le Thi Hong Mai’s home collapsed into a river in Vietnam’s Mekong Delta, where shoreline erosion caused by sand mining and hydropower dams threatens hundreds of thousands of people. Sand – needed to produce concrete – is the world’s second most exploited natural resource after water, and its […]

One summer morning, Le Thi Hong Mai's home collapsed into a river in Vietnam's Mekong Delta, where shoreline erosion caused by sand mining and hydropower dams threatens hundreds of thousands of people.Over the past two decades, hydropower dams upstream on the Mekong have restricted the flow of sand to the delta.