Many people in Dakar, Senegal, choose the least expensive way to dispose of the raw sewage that collects in their septic systems. The result is that sewage contaminates their neighborhoods and makes people sick. The healthier option is more expensive, and it stays expensive because sewage collection companies have agreed not to compete with each other. They set a price that makes the cost too high for most people to pay. Listen to learn about how an economist implemented a new program to bring down prices and clean up the local environment.
Story Length: 3:40
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Scientists are creating bacteria batteries by using wastewater to generate electricity. The microbes from sewage can be harnessed to develop microbial fuel cells. The process could provide ways to provide energy in remote places for very little money. Listen to learn how scientists are developing this energy and what they are learning from it.
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