Other challenges thumb|Movement of nomads in Chad The violent herder–farmer conflicts in Nigeria, Mali, Sudan and other countries in the Sahel region have been exacerbated by climate change, land degradation, and rapid population growth. Droughts and food shortages have been also linked to the Mali War.
Other ,challenges thumb|Movement of nomads in Chad The violent herder–farmer conflicts in Nigeria, Mali, Sudan and other countries in the Sahel region have been exacerbated by climate change, land degradation and rapid population growth. Droughts and food shortages have been also linked to the Mali War.