Cows to Kilowatts: A Bounty from Waste

The Nigerian startup lowers slaughterhouse pollution, eliminates greenhouse gas emissions, and produces clean, cheap energy

It's a problem facing many African cities: In Ibadan, the largest city in southwestern Nigeria, abattoirs routinely pour untreated animal waste into local rivers and lakes. The unregulated dumping packs an unwelcome double whammy: It spreads animal disease to humans, and the degradation of waste generates methane and carbon dioxide—greenhouse gases that contribute to global warming.

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