Levels of air pollution, including harmful particulate matter , are higher in and around the floodplains of the Yamuna, which should ideally be home to rich eco-systems.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/pollution-remains-floodplains-due-sink-effect-study
[2] http://admin.indiaenvironmentportal.org.in/category/author/damini-nath
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/yamuna
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ecosystems
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/national-green-trbunal-ngt
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environmentalists
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution