développement durable (1) statistiques (1) vitesse (1) recherche (1) province (1) projet (1) productivité (1) plantation (d'arbres) (1) matériau (1) innovation (1) déforestation (1) rotation des cultures (1) Afrique Centrale (1) abords (agglomération) (1) Afrique (1) Cleaning (1) Implements (1) Showing (1) Methods (1) Identification (1) Statistics (1) Sustainable development (1) Tools (1) Statistics (1) Speed (1) Social sciences (1) Research (1) Participant observation (1) Multiplication (1) Impact (1)