Wednesday, January 7, 2015 Sub-Saharan Africa
Source: Fast Company
Millions of rural villagers around the world still cook with wood and charcoal, with all the limitations and inconveniences that implies. Women spend time and energy collecting and hauling wood, which contributes to deforestation and takes them away from more productive uses of their time. Worse, burning wood and charcoal inside homes produces extremely unhealthy fumes.
Biogas produced from organic waste, such as cow dung and farm cuttings is a good alternative, because it's lightweight and clean burning. But it's not possible to have a bio-digester—a system for breaking down the waste to produce biogas—in every person's home. That's too expensive and impractical. You need upwards of five or six households invested in a digester to cover its costs.