Discarded plastic bottles filled up with water and a bit of bleach light up the slum houses of Manila. With little more than waste plastic bottles filled up
with water, social entrepreneur Illac Diaz has found a new way to provide slum dwellers in the Philippines with light. Diaz’s smart solution, originally invented in 2002 in Brazil and further developed by students from the Massachusetts Institute of Technology (MIT), is as simple as it is brilliant.
Punch a bottle-sized hole in the corrugated iron roof of a shack. Insert a one-liter plastic bottle into the hole and seal it there—about a third of the bottle remains above the rooftop, exposed to the sunlight, two thirds of the bottle is suspended inside the home like a giant bulb.
Via Ethical Gifts, Noor Fatima