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Wild Weather Is Endangering World’s Oldest Form of Clean Power (1)

June 22, 2019, 9:59 PMUpdated: June 24, 2019, 6:46 PM

The Kariba Dam has towered over one of Africa’s mightiest rivers for 60 years, forming the world’s largest reservoir and providing reliable electricity to Zambia and Zimbabwe.

But as drought grips the region, flow on the Zambezi river has dwindled to a third of what it was a year ago. Last month, Zambia’s state-owned power utility began cutting output, unleashing daily blackouts that leave more than 17 million people in the dark.

“The Kariba Dam has been absolutely essential for that region,” said Randall Spalding-Fecher, an energy adviser whose doctoral thesis included examining how climate change may impact hydropower on ...