The pollution of Ganga is a complex issue that needs a multi-pronged approach to address.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/many-reasons-gangas-plight-experts
[2] http://admin.indiaenvironmentportal.org.in/category/author/binay-singh
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ganga
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/indian-institute-technology-iit
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-basin
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sewage-pollution
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ganga-action-plan
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kanpur-d
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution