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…
The bio-fuel start-up that sells cooking gas by the rucksack
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