Sunlight and plastic bottles could be the solution to Kibera's water woes
Science from the Swiss cleans water with sunlight.

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Solar disinfection (Sodis) is helping communities in developing countries access clean drinking water one clear plastic bottle at a time. 

In Kenya’s Kibera slums, clean water is hard to come by and too expensive to buy. Watch how the community has slashed cases of waterborne illness by introducing this simple Sodis solution.