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Out now. National Geographic Explorer @drsteveboyes has proven the Angolan Highlands to be the source of the Zambezi River. With support from our #PerpetualPlanet Initiative, he is seeking greater protection for this vital area. More on https://t.co/qPKKy3cKES #Reachforthecrown https://t.co/Yf2I2JjU6x
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