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Globally, an estimated 2.5 billion people lack access to improved sanitation.
Diarrheal disease is a common cause of morbidity and mortality.
Tropical Storm Jeanne struck Haiti in September 2004, causing widespread flooding which contaminated water sources, displaced thousa
The Treguine refugee camp in Eastern Chad, is in a semi-arid terrain of hard, crystalline rock, where hard-rock boreholes proved ina