Sandra Postel: Troubled Waters | Nat Geo Live

Описание: National Geographic Fellow Sandra Postel views the world through a water lens, advocating for all to make simple and easy changes to their everyday lives that will help "Change the Course" of the Earth's precious supply of freshwater.
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Sandra Postel: Troubled Waters | Nat Geo Live
   • Sandra Postel: Troubled Waters | Nat Geo Live  

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