The bio-fuel start-up that sells cooking gas by the rucksack
Inside a large ramshackle shed a struck match is held to the end of a metal pipe, and a faint blue flame springs into life. Zenebech Alemayehu smiles, puts her finger tips to her lips, then towards the flame, a symbolic kiss for her new biogas business. A single mother with a nine-year-old son to look after, Ms Zenebech, 32, recently bought a local franchise from a company called B-Energy, which aims to provide households across Ethiopia with cheap, portable biogas for cooking. The metal pipe leading into Ms Zenebech's shed comes from a 5m (16ft) long plastic tank, which is a sealed compost bag or "digester". Read more at: BBC