Improvements in the water quality of many freshwater and most coastal marine ecosystems requires reductions in both nitrogen and phosphorus inputs.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/controlling-eutrophication-nitrogen-and-phosphorus
[2] http://admin.indiaenvironmentportal.org.in/category/author/daniel-j-conley
[3] http://admin.indiaenvironmentportal.org.in/category/author/hans-w-paerl
[4] http://admin.indiaenvironmentportal.org.in/category/author/robert-w-howarth-et-al
[5] http://admin.indiaenvironmentportal.org.in/category/journal/science
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/eutrophication