This Saltwater-Powered Lamp can also charge your cell phone!

Lighting is something that we take for granted in the developed world, but there are still many areas around the globe where people lack reliable access to light at night. Around one-fifth of the world’s population has no access to electricity. They often use kerosene lamps, which contribute to indoor pollution and have to be refilled with oil regularly. Also they are bad for the environment and human health. To solve this problem, an engineering start-up called SALt(Sustainable Alternative Ligh...
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