Soil Lamp by Marieke Staps

Dutch designer Marieke Staps has built a lamp that will run on the power of mud, providing you with free and environmentally friendly energy forever and ever. The metabolism of biological life produces enough electricity to keep a LED lamp burning. The mud is enclosed in various cells. These cells contain copper and zinc that conduct the electricity. The more cells there arem the more electricity they generate. This technique offers a welth of possibilities. The only thing the lamp needs is a splash of water every now and then.

Source: Marieke Staps