The Xijiang River (L) and its tributary Guijiang River in Wuzhou, south China's Guangxi Zhuang Autonomous Region. Untreated water can pose a threat to almost a billion people in the world, a study reported. Photo: Xinhua

Almost a billion people at risk from untreated wastewater: study

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The Xijiang River (L) and its tributary Guijiang River in Wuzhou, south China's Guangxi Zhuang Autonomous Region. Untreated water can pose a threat to almost a billion people in the world, a study reported. Photo: Xinhua
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