Changes

[[Image:cloth filtering.jpg|thumb|leftright|600px|The steps of filtering water through a cloth. Diagram: CARE/CDC Health Initiative, etc. from [http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=14&ved=0CDgQFjADOAo&url=http%3A%2F%2Fwww.cdc.gov%2Fsafewater%2Fmanual%2Fsws_manual.pdf&ei=UYI1UOSsLIOviAK2zYFI&usg=AFQjCNGAyphAifOHvfYLoZ4oOxxTDn_c_g&sig2=CbDFQ2mGaKU44X6_m1SsYQ Safe ProjectsSafe Water Systems for theDeveloping World:A Handbook for ImplementingHousehold-Based Water Treatmentand Safe Storage ProjectsEstes.]]]