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Indigo - A Simple Reusable Refrigerator that uses no Electricity or Ice.

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 Society / Culture   |   Health   |   Environmental   |   Science   |   Social Science   |   Technology
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Bill Gates introduces the Indigo, the remarkable invention that uses no electricity, no ice, and no batteries to store vaccines at the precise temperature required to remain effective.
Learn more at https://b-gat.es/2sDyOMv

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