52 ENVIRONMENT | MT 5206 environmental policy | BT1 pollution control measures | RT noise [5216] | noise pollution [5216] | sound insulation [6831] | working conditions [4416]
52 ENVIRONNEMENT | MT 5206 politique de l'environnement | BT1 lutte contre la pollution | RT bruit [5216] | condition de travail [4416] | isolation phonique [6831] | pollution acoustique [5216]