Eutrophication, too much nutrient enrichment in aquatic ecosystems resulting in algal blooms and anoxia, results in fish kills, lack of biodiversity, and renders water unfit for consuming and various industrial uses. Extreme fertilization and manure application to cropland, and high livestock stocking densities result in nutrient (mostly nitrogen and phosphorus) https://the-farming-blog.s3.eu-north-1.amazonaws.com/index.html