The countries of North Africa, unlike those of the rest of the continent, have wide-ranging and ancient traditions of manufacture. At the end of the 19th century, however, Africa as a whole was regarded solely as a potential source of raw materials or as a natural market for Europe. In the course of time, limited industrialization tended to converge around the relatively large expatriate settlements, where technical considerations operated in favour of the industrialization of some areas and transport costs constituted the dominant development factor in others. Though World War II led to acceleration in the process of industrial development, by 1950 the total factory output of manufacturing industries (excluding South Africa) still remained small.
After 1950 output rapidly increased. The substantial increase and its range were attributable to such factors as increased demand, the substitution of home-produced for imported goods, the encouragement of manufacturing by individual African administrations, and an influx of development capital and petrodollars. Major weaknesses nevertheless were evident, among them high capital costs, the political division of Africa into more than 50 countries, which inhibited mass production and mass marketing, and a scarcity of skilled personnel.
Despite its expansion since about 1950, the relative significance of manufacturing remains considerably smaller than in the more-advanced countries and smaller also than in continental Asia and in Latin America. Furthermore, the share of manufacturing in the gross domestic product varies widely in different African countries. At the lower end of the spectrum are countries such as Equatorial Guinea, Guinea, and Niger, and at the upper end of the spectrum are countries such as Egypt, Algeria, and South Africa. The total output of manufacturing in South Africa alone, however, is nearly 50 percent of the output in the remainder of the continent.
Manufacturing in Africa tends to concentrate on comparatively simple items and on those where some special advantage is available to the African producer, although the range of products has widened. Industrial production includes electric motors, transport equipment, and tractors, while airplanes are also assembled. The leading heavy industries are chemical and petroleum, coal, rubber, and metal manufacture. Most industrial plants, however, are of the relatively simple kind, being engaged in food processing or in manufacturing textiles, leather products, and cement or other building materials.
The mining industry is an increasingly significant source of national income, foreign exchange, and raw materials for the development of local processing industries. The industry is very unevenly distributed: more than half of mineral earnings came from North Africa alone, and nearly one-fourth came from Southern Africa.
Except in South Africa, iron and steel are used mostly for construction rather than for engineering. There are integrated iron and steel plants in Algeria, Tunisia, Egypt, Zimbabwe, and South Africa, while smaller production facilities—often based on the transformation of scrap—exist in several other countries.
Petroleum-refining capacity is based on domestic crude oil output in a few cases and on imported crude oil in others. In some countries the development of the petrochemical industry followed the establishment of refineries. In 1965 there were only three major petrochemical complexes in Africa—in Zimbabwe, Egypt, and South Africa. By the late 20th century several more countries had large refinery capacities, including Algeria, Ghana, Kenya, Libya, Morocco, Nigeria, Senegal, Sudan, and Tunisia.
Most of the textiles are processed in bleaching, dyeing, and printing establishments that form an integral part of composite spinning and weaving units. With the exception of Egypt, producers have concentrated on the home market and on the manufacture of cotton textiles. Although African countries export textiles, their imports are usually larger. Rayon–synthetic and woolen materials are, for the most part, imported. Ready-made clothing, both domestic and imported, has emerged as a major market factor.
Most African countries have cement plants, the leading producers being South Africa and Algeria. The transport costs of cement make its price variable. Prices are lowest on the North African coast, somewhat higher on the west and east coasts, and highest in the inland countries.
By far most of Africa’s wood output is used for fuel. Sawmills, however, are distributed throughout the continent. Plants for the manufacture of plywood, particleboard, and fibreboard have a considerable amount of excess capacity. The pulp and paper industry is concentrated in North Africa and in Southern Africa, although a number of small paper mills have been established in other parts of the continent. The main products of the paper industry proper comprise newsprint, printing and writing papers, paper and paperboard, and industrial paper. The bulk of the output of all paper products is directed to national markets. Power
A spectacular development in the use of electric energy took place in the second half of the 20th century, partly because of the growth of the petroleum industry and partly because of the establishment of large hydroelectric plants and some thermoelectric plants. The increased quantity and quality of electric energy gave rise to problems of transmission and distribution. Unlike thermoelectric plants, which may be sited where the consumer demand is greatest, sites of hydroelectric installations are not flexible, and the type of transmission lines in use has therefore changed. Although in the 1950s it was common practice to use lines with transmission voltages of less than 220 kilovolts, transmission lines were later built that could handle higher voltages. In Nigeria, for example, 330-kilovolt lines were strung; similar lines were used in Zimbabwe’s system, which feeds Harare and Bulawayo in Zimbabwe, as well as the Copperbelt in Zambia. This same system is interconnected in the north with the large Katanga (Shaba) region hydroelectric power stations in the Democratic Republic of the Congo. The construction of high-tension lines to supply power to the Katanga Copperbelt was completed in 1982. Much of the power for Egypt’s population centres is supplied by lines from such hydroelectric power stations as that at the Aswan High Dam. Construction of 533-kilovolt lines to transmit power from the Cahora Bassa hydroelectric station in Mozambique to South Africa was completed in 1974. The possibility of supplying landlocked states with energy from the large hydroelectric plants in the coastal states is more likely to be considered in the future.
A number of steam power stations are located in ports and cities near the coasts. The largest installations of this kind operate in Tunis, Tunisia; Casablanca and Oujda, Morocco; Dakar, Senegal; Abidjan, Côte d’Ivoire; and Lagos, Nigeria. Steam power stations using coal are by far the most common, especially in South Africa.
Electric energy consumption in large urban centres, especially when they are near coastal towns and mining areas where industrial activity has taken shape, has increased considerably. Although some countries have extended networks to the rural areas or increased the numbers of isolated low-powered stations and independent networks, progress in rural electrification has not been especially noteworthy. Trade Internal trade