Origen: 
IRIN - water and Sanitation
URL: 
http://www.irinnews.org/report.aspx?ReportId=94224
BANGKOK 17 November 2011 (IRIN) - Thousands of Thais - with noses pinched and fingers crossed - are tossing mud balls into fetid flood water, in the hope of improving the quality of stagnant water following weeks of flooding.