Here's an all-natural concept... A lamp that illuminates by the power of algea. The Latro Lamp designed by Mike Thompson gets energy from the CO2 from the algae.
The lamp is made possible thanks to a recent discovery made by researchers at the universities of Yansei and Stanford. The researchers found that a tiny electrical current can be extracted from algae during photosynthesis.
The diagram looks like someone taking a hit from a Bong...when actually to activate the lamp all you have to do it breath into it and put out in the sunlight.