Eutrophication, abnormal nutrient enrichment in aquatic ecosystems leading to algal blooms and anoxia, causes fish kills, loss of biodiversity, and renders water unfit for drinking together with other industrial uses. Abnormal fertilization and manure application to cropland, together with large livestock stocking densities result in nutrient (primarily nitrogen and phosphorus) https://storage.googleapis.com/the-farming-blog/index.html