développement rural 2 gestion de l’environnement 2 zone aride 2 zone semi-aride Afrique 1 Chili 1 Communities - Rural Groups 1 Control 1 Desertification 1 Earth & Environmental Sciences 1 Environmental aspects 1 Environmental policy 1 Geography 1 Great Green Wall (Project) 1 Maghreb 1 Physical Geography 1 Reforestation 1 Rural development 1 Social Sciences 1 Sociology & Social History 1 Soil conservation projects 1 Soil management 1 Sénégal 1 Tunisie 1 agroforesterie 1 analyse spatiale 1 arbre 1 biotechnologie 1 conservation de la nature 1 dynamique de population 1