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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
The December 2004 tsunami in Sumatra, Indonesia, destroyed drinking water infrastructure, placing over 500,000 displaced persons at