Soil Lamp
The design of Marieke Staps used free and environment-friendly energy to create light. The metabolism of biological living produces enough electricity to burn the LED. The only thing the lamp needs is mud and water. The mud is spread out into multiple warrants. These warrants also consist of copper and zinc to conduct the electricity. The more warrants there are placed the more power will be produced.
The anode and cathodes (copper and zinc) are depleted over time and will need to be replaced. These materials are manufactured using “non-free” energy. In a round about way you could argue that the energy released via the process that erodes the metals is “stored” in them when the metal is processed from ore.
It looks pretty though.
Great point Stephen! Nothing is free in life and/or in nature!
I have heard about your site from friend. I wanna say you it is wonderful site. and i like this bulb most. I will definitely mention about it in my blog.
thanks for sharing these things with us.