off topic:
a liter of light. | Ein Liter Licht
ein interessantes Projekt welches mMn. Unterstützung verdient.
http://aliteroflight.org/index.php
AUSZUG VON DER WEBSITE
About Liter of Light
Our latest project is the Liter of Light or Isang Litrong Liwanag. It brings the eco-friendly bottle light to communities living without electricity.
The Technology
What do you get with sunshine and an old plastic bottle filled with water and chlorine? Thanks to Alfred Moser and a group of MIT students, you get a 55-watt solar bulb that refracts sunlight! It’s powerful enough to light up a home but more than that it’s environmentally friendly, inexpensive, and easy to make
