[Prospects of world food production]

agricultural products agriculture intensive alimentos climatic change conservation des ressources cultivated land demografia demographie demography ecosistema ecosystems erosion escasez de alimentos existencias de alimentos famine food resources food security food stocks food supply foods intensive farming malnutrition produit agricole produit alimentaire recursos alimentarios resource conservation ressource alimentaire seguridad alimentaria stock alimentaire suministro de alimentos tierras cultivadas