Monitoring the environment.
D000397:Air Pollution / Q000517:prevention & control; D004777:Environment; D004787:Environmental Pollution / Q000517:prevention & control; D005308:Fertilizers / Q000009:adverse effects; D006077:Government Agencies; D010575:Pesticides / Q000009:adverse effects; D012987:Soil; D014481:United States; D014876:Water Pollution / Q000517:prevention & control
D005308:Fertilizers; D010575:Pesticides; D012987:Soil