Factors
Entities
NitrateOhio RiverUnited States Geological SurveyEcosystemTyphoid feverLouisiana State UniversityBisonInvasive speciesSteve KingAmmoniaDrainage basinSaint PeterLake ErieAlgaeMidwestern United StatesAmerican bisonNeurotoxinMineralFertilizerCholeraNancy ReaganChlorineSewageMississippi RiverWildlifeConnecticutNorth AmericaAcidIowaMassachusettsFishBacteriaAgricultureOxygenWorld War IIPennsylvaniaWorld Health OrganizationNew York CityUnited StatesEutrophicationNutrient pollutionHydrologyIntensive farmingMethylmercuryThe Des Moines RegisterScientific consensusDonna NobleOrganic matterEcologySoil erosionSedimentWater pollutionIndigenous peoples of the AmericasDes Moines River

