Worldwide, nearly 1.2 billion people live without electricity, something which many of us take for granted. Now, with a bit of 멺reen?thinking and a splash of chlorine chemistry, a Philippines-based non-profit group are doing their bit to bring affordable lighting to low-income houses. Winners of the 2015 Zayed Future Energy Prize, Liter of Light use old plastic bottles filled with water and chlorine to produce a 55-watt solar bulb to capture and refract sunlight ?a device which has already illuminated 28,000 homes in Manila alone. Such technology was vital in the aftermath of the 2013 typhoon which had such a devastating impact on the Philippines. With further projects in India, Indonesia and Switzerland, they hope to install over a million of these lights worldwide by the end of the year and it is all thanks to innovation and a bit of chlorine chemistry.