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Globally, an estimated 2.5 billion people lack access to improved sanitation.
Background: Refugees are at high risk for communicable diseases due to overcrowding and poor water, sanitation,
Changes in water quality of a sand aquifer on the east coast of Sri Lanka due to the 26 December 2004 tsunami and subsequent remedia
Tropical Storm Jeanne struck Haiti in September 2004, causing widespread flooding which contaminated water sources, displaced thousa