The rationale of environmental standards.
D000397:Air Pollution / Q000517:prevention & control; D003140:Communicable Disease Control; D004782:Environmental Health; D006077:Government Agencies; D007883:Legislation, Medical; D009784:Occupational Diseases / Q000517:prevention & control; D009786:Occupational Health Services; D011315:Preventive Medicine; D012499:Sanitation; D014481:United States; D014876:Water Pollution / Q000517:prevention & control; D014881:Water Supply