Water gets worse.
D004782:Environmental Health; D005380:Financing, Government; D006077:Government Agencies; D007878:Legislation as Topic; D009566:Nitrates / Q000378:metabolism; D010710:Phosphates; D012109:Research Support as Topic; D012722:Sewage; D014481:United States; D014876:Water Pollution / Q000517:prevention & control*
D009566:Nitrates; D010710:Phosphates; D012722:Sewage