Oxfam water technicians check the turbidity of water which... - Howard Davies, THDASI284.jpg

Oxfam water technicians check the turbidity of water which has been filtered at an Oxfam water treatment plant for people displaced by the tsunami. Ampara, Sri Lanka 2005 The provision of clean drinking water prevents water borne disease. - Howard Davies - 2005-03-05
 
 
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