Illuminating Window-Less Houses With a Plastic Bottle

New submitter DancesWithWolves writes "The BBC reports on Alfredo Moser, who came up with a way of illuminating his house during the day without electricity — using nothing more than plastic bottles filled with water and a tiny bit of bleach. In the last two years his idea has spread throughout the world. It is expected to be in one million homes by early next year.'"