Prisoners cook food via peat and biogas at Rwamagana Prison in Rwamagana, Rwanda, on November 18, 2017. All of Rwanda's prisons use their prisoners' waste - in addition to that of cows - to fuel their kitchens via biogas. At Rwamagana, biogas is used to cook corn, and peat cooks rice and beans. Many prisoners say they can usually tell when biogas is used due to the lack of smokey flavor in food. Nearly half of all Rwandans live in poverty, relying on small-scale farming for survival without gas or electricity. With so many women and children spending hours of the day foraging for wood used for cooking and light, often damaging their eyes, lungs, the forests and atmosphere, a little inventiveness helps. Enter cow and enter pig — not just as a source of food, but also the heat needed to cook it. Or more specifically, their poo — the fuel fed to a biogas digester, a tank that coverts organic waste into methane. Photographs by: Yana Paskova
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