Although it is only the tenth largest country in Africa, Ethiopia is the second most populous country on the continent. Nearly a third of the country’s urban population lives in Adis Abeba (more commonly known as Addis Ababa), in the Ethiopian Highlands. Starting in the mid-1970s, poor agricultural productivity, unemployment, and poverty pushed Ethiopians from the nearby countryside into Adis Abeba, and the city began a period of rapid growth.
The Advanced Spaceborne Thermal Emission and Relfection Radiometer (ASTER) on NASA’s Terra satellite captured this image of Adis Abeba on December 16, 2007. In this false-color image, red indicates vegetation, blue-black indicates water, beige indicates bare ground, and blue-gray indicates buildings and/or paved surfaces.
Tree-lined waterways meander through the city, evidenced by the blue-black channels lined with robust red. Areas of robust vegetation also appear along the city’s northern fringes, but most of the areas along Adis Abeba’s outskirts consist of sparsely vegetated areas or bare ground. Vegetation is especially sparse in the center of this image, where the blue-gray shades of urbanization intensify.
Even before the major influx of immigrants into Adis Ababa in the mid-1970s, a shortage of suitable housing left many city residents living in slums. Over the years, the need for housing lead to illegal housing developments that eventually encroached on protected forests and reserves around the city’s margins. A report by the United Nations Environment Programme found that, while Ethiopia’s slum population increased between 1990 and 2001, sanitation services improved substantially over the same period.
NASA image created by Jesse Allen, using data provided courtesy of NASA/GSFC/METI/ERSDAC/JAROS,
and U.S./Japan ASTER Science Team. Caption by Michon Scott.
Although it is only the tenth largest country in Africa, Ethiopia is the second most populous country on the continent. Nearly a third of the country’s urban population lives in Adis Abeba (more commonly known as Addis Ababa).
In western Africa, just south of the Sahara Desert, lies the landlocked nation of Burkina Faso. The nation experienced a 200 percent increase in urban population between 1975 and 2000. Much of that growth occurred in the capital city of Ouagadougou: Between 1960 and 1993, Ouagadougou experienced a 14-fold increase in area.