earthrise - Solar Revolution

As the sun sets over developing countries, more than a billion people are either plunged into darkness or forced to rely on polluting light sources such as kerosene. While clean energy alternatives exist, switching to them has been slow and in Kenya, more than 80 percent of the country's 40 million inhabitants rely on kerosene, candles and torches as their main source of light. But the development of an all-in-one solar electricity system that powers lights, radios and phones is revolutionising thousands of households and businesses. Robin Forestier-Walker travels to Kenya's Rift Valley to see how innovative financing, distribution and product design is heralding a new era in solar lighting.