Links:
[1] http://admin.indiaenvironmentportal.org.in/news/purification-desalination-its-all-about-water
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-chennai
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-treatment-technology
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/desalination
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-supply
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tamil-nadu