راه حلی برای بطری نوشابه - فیلیپین
Plastic Bottles Light Up Slums
- 20 February 2012
A solar bottle being prepared for installation. (Source: YouTube screenshot)
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. The first in a new Knowledge site series of 'Smart Solutions'.
The idea is literally illuminating. Discarded plastic bottles filled up with water and a bit of bleach light up the slum houses of Manila.
Here, dwellings are packed so close together that people live in darkness even during the daytime. Electrical lighting, assuming that a power supply is even available, is prohibitively expensive and many people, social entrepreneur Illac Diaz found, ended up being cut off by the electricity companies because they couldn’t afford their bills.
According to statistics from the Philippine National Electrification Commission in 2009, 3 million households on the outskirts of Manila were without power.
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.
Fill the bottle with filtered water, add a little bleach and you have a "solar bottle". The sunlight from above is refracted through the liquid into the gloom below, enough to brighten the entire room.