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Globally, an estimated 2.5 billion people lack access to improved sanitation.
When responding to an emergency situation, ensuring safe excreta disposal is an urgent priority in the disaster relief effort.
The bacteriological quality of drinking-water supply of five major urban centres affected by the October 2005 earthquake in Pakistan
Following the Asian tsunami of 26 December 2004, the vital domestic fresh-water wells in the coastal zone were either scoured out of