As part of the ‘Free Energy Friday’ series of posts, here is a fantastic concept brought to you by Marieke Staps; The Soil Lamp.
The idea is simple, the lamp has copper strips coming out of the bottom of it and it uses the soil as an electrolyte to power the LED light. All that is required in order to light your humble dwellings is the occasional sprinkling of water on the mud to keep the light shining bright.
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