Sahel

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Sahel Band of semi-arid scrub and savanna grassland in Africa, s of the Sahara. It extends through Senegal, s Mauritania, Mali, Burkina Faso, n Benin, s Niger, n Nigeria, and s central Chad. Over the past 30 years, the Sahara has encroached on the n Sahel in the world's most notorious example of desertification.

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