Imagine eating food that was cooked using natural gas generated from your own human waste. Thousands of prisoners in Rwanda don't have to imagine it -- they live it.
Prisoners' feces is converted into combustible "biogas," or methane gas that can be used for cooking. It has reduced by 60 percent the annual wood-fuel costs which would otherwise reach near $1 million, according to Silas Lwakabamba, rector of the Kigali Institute of Science, Technology and Management, where the technology was developed.
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