Why has a river in Zambia 'died'?

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A vibrant river reportedly ‘died' overnight in Zambia after an acidic waste spill at a Chinese-owned mine How the Sudan crisis is affecting gum arabic production And can AI help African farmers produce more? Presenter : Charles Gitonga Producers: Yvette Twagiramariya, Amie Liebowitz and Bella Hassan. Senior Producer : Paul Bakibinga Technical Producer: Jonathan Greer Editors: Andre Lombard and Alice Muthengi