Bringing light to the poor, one liter at a time (via reuters)

Video Description: A bottled liter of water with a few teaspoons of bleach is proving to be a successful recipe for dwellers in the light-deprived slums of the Philippines. The simple technology, made known by eco-entrepreneur, Illac Diaz, is spreading sunlight in places where it has never been, and saving residents money at the same time.