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At the Environmental Protection Agency's fifth annual Sustainable Design Expo on the National Mall in Washington, DC, college students exhibited their projects addressing sustainability issues including alternative energy, water purification and green buildings.
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Produced by: Lea Winerman |
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| Simple and Unbreakable |
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| The system is so simple that even a child can use it, says Hahn. That's important, she says, because in Mongolia it's generally children who collect the water. |
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Speaking: Allison Hahn
Photo Credit: Travis Daub, Audio Credit: Lea Winerman |
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