... Systems Network (FEWS), the climatic zone of the Sahel - between the Sahara desert and the moist Sudan savannahs of Africa - has been dropping further into desertification over the last century. It only receives between four and eight inches of rainfall a year (100m and 200m), which is slowly decreasing. The rainfall that it does receive falls mostly between the months of June and September. ? Explain why desertification is a problem - 'THE CAUSES' Desertification tends to generally be blamed on a general overuse of arid land, which degrades it to the extent that it is either entirely uncultivable or nearly so. This overuse can come from a variety of causes, each integrally tied to human relationship to the environment: overgrazing, by which pastoralists, in raising animals for their own use and for external markets, allow too many animals to graze on a certain plot of land; over ...

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