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Self-service (Economics) --- Environmental policy --- Technology and civilization --- Environmental policy. --- Technology and civilization. --- Self-service (Economics).

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Environmental policy --- Environmental protection

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Nature protection --- Aardwetenschappen --- Défense de l'environnement --- Ecologie --- Environmental protection --- Environmental quality management --- Environnement --- Environnement -- Défense --- Environnement -- Protection --- Environnement -- Qualité --- Environnement [Protection de l' ] --- Milieu --- Milieubescherming --- Protection de l'environnement --- Protection of environment --- Sauvegarde de l'environnement --- Sciences de la terre --- 504 --- (100) --- $?$92/01 --- 502.5/.7 --- 502.34 --- 502.35 --- 504.064 --- #A9202A