For thousands of Sri Lankans without easy access to potable water, a low-tech filter has provided them with a convenient source of safe water, saving on fuel costs and cutting disease. The water filter was first mass-produced in Nicaragua and used in emergency relief operations. It is essentially a clay pot fortified with ground paddy husk and coated with colloidal silver that strains out virtually all harmful bacteria and parasites. The American Red Cross (ARC) began production of the clay filter in Sri Lanka in January 2007 and has distributed some 10,000 units so far. (IRIN)
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