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Designed by Colombian renewable-energy startup E-Dina, WaterLight harnesses a chemical reaction between abundant resources salt water and magnesium to create an electrical current for generating light or charging mobile devices. Just a half-liter of saltwater can provide light for up to 45 days. E-Dina recently launched a crowd-funding campaign with the goal of selling more than 100,000 units when it goes into production. WaterLight already has garnered thousands of preorders, along with three patents. “There are [millions of] human beings on the planet who do not have electricity,” says E-Dina founding partner Nicolas Pinzón Cordoba. “We seek to be light where today there is only darkness.”

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