Sub Saharan Africa Review Tools A B estivation summer sleep escarpments steep cliffs separating African plateaus, create magnificent waterfalls malaria infectious disease carried by mosquitoes Lake Tanganyika world's longest freshwater lake eucalyptus fast growing trees that could help with desertification Kilimanjaro highest peak in Sub-Saharan region extinction disappearance from the earth desertification transformation of arable land into desert poaching illegal hunting of wildlife subsistence farming raising enough food to feed a family or village overgrazing a cause of desertification pandemic disease affecting large population over wide geographic area cash crops crops grown and raised for profit, lower prices and cause crop damage few natural harbors oceangoing ships cannot enter rivers tropical savanna and tropical rainforest Sub-Saharan climates resulting from location in tropics Sahel separates Northern Sahara from Southern grasslands Lake Victoria second largest freshwater lake in world and source of White Nile apartheid strict separation of races gold important resource in Africa cataracts waterfalls Africa second largest continent Great Rift Valley location of most of Africa's lakes Sahel steppe grasslands Zaire large deposits of diamonds