noun, Pathology. 1. the accumulation of excessive ketones in the body, as in diabetic acidosis. Origin of ketosis. 1915-1920.
Climate zones of Africa, showing the ecological break between the hot desert climate of the Sahara Desert (red), the hot semi-arid climate of the Sahel (orange) and the tropical climate of Central and Western Africa (blue).
1 World population distribution. 2  The Sahara desert is sparsely populated. 3  With constantly hot temperatures (+40C) during the day, and very little rainfall (1mm a year at Aswan in Egypt) the Saharaâs climate is difficult for people to live with. The Sahara desert is sparsely populated. 2  With constantly hot temperatures (+40C) during the day, and very little rainfall (1mm a year at Aswan in Egypt) the Saharaâs climate is difficult for people to live with.