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Hippo Water Roller Project - Atlas of the Future — Atlas of the Future
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Hippo Roller' gadget providing access to clean water - YouTube
Hippo roller reinvents the wheel - Plastics le Mag
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WaterWheel to Bring Clean Water to a Thirsty World | Graham Sustainability Institute
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The Hippo Roller: A Water Collection Soution
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WaterWheel will bring clean water to a thirsty world
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Students Design Water Barrel That Filters as it Rolls - News - Carnegie Mellon University
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All About Log Rolling, the Unique Sport That's Much Tougher Than It Looks | SELF
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The Hippo Water Roller Is Changing Lives in Sub-Saharan Africa
