Population pyramid, expansive, constrictive, stationary, Urban Areas, central city, suburbs, exurbs, Land use and the function of cities, concentric zone model, sector model, multiple nuclei model, Economic Systems, Traditional Economy, Command Economy, Market Economy, Mixed Economy, Economic Activity, Primary Activities, Secondary Activities, Tertiary Activities, Quaternary Activities, Type of resources, Renewable sources, Non-renewable sources, Inexhaustible energy sources, HDI, life expectancy, expected years of schooling, gross national income per capital, The Deserts in Africa , The Sahara, The Namib, The Kalahari.

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