Shrinking the dead zone.
Simpson
S
S
D004784:Environmental Monitoring; D005308:Fertilizers / Q000009:adverse effects; D005618:Fresh Water / Q000737:chemistry*; D008145:Louisiana; D009584:Nitrogen / Q000009:adverse effects; D009792:Oceans and Seas; D010100:Oxygen / Q000032:analysis*; D012623:Seawater / Q000737:chemistry*; D014481:United States; D014484:United States Environmental Protection Agency; D014876:Water Pollution
D005308:Fertilizers; D009584:Nitrogen; D010100:Oxygen