A new report on water insecurity says floods and drought amid climate change and a lack of investment in reliable water supplies is weighing on the global economy by tens of billions of dollars a year.
"Water is productive and it can be destructive," David Grey, an Oxford professor, said in video remarks.
According to the report from the University of Oxford published at the start of the World Water Forum in Korea, South Asia has the largest concentration of water-related risks.
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