Pollution in Yamuna refuses to come down despite efforts by the Delhi government and various agencies to reduce the contamination levels in the river.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/doctors-call-tests-mystery-pollution-found-yamuna
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/daily-mail-united-kingdom
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/yamuna
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi-jal-board-djb
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-quality
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects