Multitemporal environmental studies conducted
by remote detection in the Sahel all present similar results: a
substantial reduction of the forests and vegetation generally, with
a simultaneous significant increase in degraded soils, often indicated
by soil being shifted due to wind action.
Globally, most scientists and institutions
basically agree about the causes of desertification: firstly, exacerbated
and constantly growing anthropic action on the environment, including
exponential population growth, over-grazing, deforestation, over-cultivation
of lands and deterioration of the soils and, secondly, the climatic
crisis which originally revealed desertification.