How water bottles create cheap lighting in Philippines
A simple initiative in the Philippines is bringing a bit of brightness into the lives of the country's poorest people.
The project is called "Litre of Light", and the technology involved is just a plastic bottle filled with water.
It's an environmentally-friendly alternative to an electric light bulb, and it's virtually free.
The BBC's Kate McGeown reports from Manila.
via bbc.co.uk
