Protection Cultural property 21 Protección 13 Environnement 10 Environmental protection 8 Law and legislation 8 Patrimonio cultural 7 Bienes culturales 5 Derecho y legislación 5 Ecology 5 Faune 5 Zeitschrift 5 Ame ́nagement 4 Cultural policy 4 E ́cologie 4 Nature 4 Política cultural 4 Conservation 3 Conservation of natural resources 3 Consommateurs 3 Ecologie 3 Environmental policy 3 History 3 Nature conservation 3 Politique gouvernementale 3 Wildlife conservation 3 Antiquities 2 Citizen participation 2 Collection and preservation 2 Conservación de los bienes culturales 2