This video of an impoverished Filipino community making the best of what they've got while using some ingenious recycling shows us that technology isn't only smartphones and tablets. Sometimes the simplest answer is the right one.
Only a bottle, bleach and a hole in the roof can create the light equivalent of a 50 watt light bulb to a dark room - only by adding sunlight. A green project that is brilliantly simple.
Don't like the subtitles? Here's a report on the project by Reuters via YouTube: http://youtu.be/a9fpolCvM-8