mesh_terms: D000397:Air Pollution / Q000032:analysis* / Q000517:prevention & control*; D004781:Environmental Exposure / Q000032:analysis / Q000517:prevention & control* / Q000592:standards; D004784:Environmental Monitoring / Q000592:standards*; D005062:European Union; D033161:Government Regulation; D008452:Maximum Allowable Concentration; D017410:Practice Guidelines as Topic