Usafi wa mazingira : Tofauti kati ya masahihisho

*[http://www.indiasanitationportal.org/ India's National Level portal juu ya Usafi wa Mazingira]

*[http://www.google.com/publicdata/explore?ds=d5bncppjof8f9_&ctype=l&strail=false&nselm=h&met_y=sh_sta_acsn_ur&hl=en&dl=en Google - umma data] "Kuboresha huduma za usafi wa mazingira, mjini (% ya idadi ya watu mijini na kupata)"

 

[[Category:Usafi wa mazingira]]

[[Category:Usafi]]

[[Category:Afya ya umma]]

 

[[ar:تطهير المياه]]