Africa’s Lakes and Rivers Thrive on Hippo Dung

Hippos are helping to rejuvenate African rivers and lakes. Scientists say the animal's nutrient-rich dung makes them vital to the health of the aquatic ecosystem. But the researchers also warn that the dwindling hippo population could prove harmful to those waterways. VOAs Deborah Block takes us to Kenya where the scientists did their latest research.
Africa’s Lakes and Rivers Thrive on Hippo Dung
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