The chicken farm Etiene Twagirayezu, 60, was able to create as a result of saving time via cooking with a biogas digester at his home in Rutabo, Rwanda on November 18, 2017. Twagirayezu says that before his digester, he'd spend up to 3 hours a day gathering 10 kilograms of wood, and saw kids get injured climbing trees and be late to school doing the same. He added he was happy his workload at home was reduced due to being able to use his cow's and pig's poo instead of wood as fuel, as well as about the resulting lessening of deforestation.
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 converts organic waste into methane.