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| the arid area on the S flank of the Sahara desert that stretches across six countries from Senegal to Chad. |
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| When a country has more than one ecoomic system. |
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| the rapid depletion of plant life and the loss of topsoil at desert boundaries and in semiarid regions, usually caused by a combination of drought and the overexploitation of grasses and other vegetation by people. |
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| Spoken in Tanzania. South African language. |
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| a fiber yielded by an agave, Agave sisalana, of Yucatán, used for making rope, rugs, etc. |
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| gummy exudate obtained from the acacia tree, esp. Acacia senegal, used as an emulsifier, an adhesive, in inks, and in pharmaceuticals. |
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| the deliberate and systematic extermination of a national, racial, political, or cultural group. |
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| a long, precipitous, clifflike ridge of land, rock, or the like, commonly formed by faulting or fracturing of the earth's crust. |
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| diversity among and within plant and animal species in an environment. |
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| a port or special section of a port where goods may be unloaded, stored, and shipped without payment of customs duties. |
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| the open country, bearing grass, bushes, or shrubs, or thinly forested, characteristic of parts of southern Africa. |
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| an Afrikaans-speaking native of South Africa of European, esp. Dutch, descent. |
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| any system or practice that separates people according to race, caste, etc. |
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