52 ENVIRONMENT | MT 5216 deterioration of the environment | BT1 natural disaster | BT2 degradation of the environment | RT acidification [5216] | arid zone [5211] | Sahel [7221]
52 ENVIRONNEMENT | MT 5216 détérioration de l'environnement | BT1 désastre naturel | BT2 dégradation de l'environnement | RT acidification [5216] | Sahel [7221] | zone aride [5211]