Forced migration, environmental change and long-term development: Livelihood security among pastoralists in Northern Sudan: Post-hunger development in a country at war

drought economic development environmental impact escasez de alimentos famine food security gestion des ressources human population impact sur l'environnement impacto ambiental interest groups living standards migration natural resources niveau de vie nivel de vida nomadism nomadisme nomadismo pastoral society political systems population humaine recursos naturales refugees refugiados resource management ressource naturelle seguridad alimentaria sociedad pastoral soudan sudan