Rapid urbanisation and human encroachment– especially in the Kathmandu Valley– have left Nepal's rivers highly polluted.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/local-groups-help-nepal-aims-clean-its-riverways
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/nepal-news-nepal
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/nepal
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution-control
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/south-asia
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bagmati