Ndola is the third largest city in

Zambia Zambia (), officially the Republic of Zambia, is a landlocked country at the crossroads of Central, Southern and East Africa, although it is typically referred to as being in Southern Africa at its most central point. Its neighbours are t ...

and third in terms of size and population, with a population of 475,194 (''2010 census provisional''), after the capital,

Lusaka Lusaka (; ) is the capital and largest city of Zambia. It is one of the fastest-developing cities in southern Africa. Lusaka is in the southern part of the central plateau at an elevation of about . , the city's population was about 3.3 millio ...

, and

Kitwe Kitwe is the third largest city in terms of infrastructure development (after Lusaka and Ndola) and second largest city in terms of size and population (after Lusaka) in Zambia. With a population of 517,543 (''2010 census provisional'') Kitwe is ...

, and the second largest in terms of infrastructure development after Lusaka. It is the industrial and

commercial Commercial may refer to: * a dose of advertising conveyed through media (such as - for example - radio or television) ** Radio advertisement ** Television advertisement * (adjective for:) commerce, a system of voluntary exchange of products and s ...

center of the Copperbelt, Zambia's copper-mining region, and capital of

Copperbelt Province Copperbelt Province is a province in Zambia which covers the mineral-rich Copperbelt, and farming and bush areas to the south. It was the backbone of the Northern Rhodesian economy during British colonial rule and fuelled the hopes of the imme ...

. It lies just from the border with

DR Congo The Democratic Republic of the Congo (french: République démocratique du Congo (RDC), colloquially "La RDC" ), informally Congo-Kinshasa, DR Congo, the DRC, the DROC, or the Congo, and formerly and also colloquially Zaire, is a country in ...

. It is also home to Zambia's first modern stadium, the

Levy Mwanawasa Stadium The Levy Mwanawasa Stadium is a multi-purpose stadium in Ndola, Zambia. It is used mostly for football matches. The stadium has a capacity of 49,800 people. It is located on the T3 Road at the start of the Ndola-Kitwe Dual Carriageway. In 2010, ...

History

What is now Ndola was first inhabited by the Lamba people led by Senior Chief Chiwala, the Lamba people migrated from the Luba-Lunda kingdom around 1600 and the town of Ndola was under Chief Mushili for some time but now it is under Chief Chiwala who came to the Lambaland during the slave trade from Malawi. The name Ndola is derived from the river, which originates in the Kaloko Hills and drains in the Kafubu River. The town of Ndola was founded in 1904, by John Edward "Chiripula" Stephenson just six months after Livingstone, making it the second oldest colonial-era town of Zambia. It was started as a boma and

trading post A trading post, trading station, or trading house, also known as a factory, is an establishment or settlement where goods and services could be traded. Typically the location of the trading post would allow people from one geographic area to tr ...

, which laid its foundations as an administrative and trading centre today. The

Rhodesia Railways The National Railways of Zimbabwe (NRZ), formerly Rhodesia Railways, is a state-owned company in Zimbabwe that operates the country's national railway system. It is headquartered in the city of Bulawayo. In addition to the headquarters, it has ...

main line reached the town in 1907, providing passenger services as far south as

Bulawayo Bulawayo (, ; Ndebele: ''Bulawayo'') is the second largest city in Zimbabwe, and the largest city in the country's Matabeleland region. The city's population is disputed; the 2022 census listed it at 665,940, while the Bulawayo City Council ...

, with connections to

Cape Town Cape Town ( af, Kaapstad; , xh, iKapa) is one of South Africa's three capital cities, serving as the seat of the Parliament of South Africa. It is the legislative capital of the country, the oldest city in the country, and the second largest ...

. The line was extended into

and from there eventually linked to the Benguela Railway to the

Atlantic The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe ...

port A port is a maritime facility comprising one or more wharves or loading areas, where ships load and discharge cargo and passengers. Although usually situated on a sea coast or estuary, ports can also be found far inland, such as H ...

Lobito Lobito is a municipality in Angola. It is located in Benguela Province, on the Atlantic Coast north of the Catumbela Estuary. The Lobito municipality had a population of 393,079 in 2014. History The city was founded in 1843 and owes its existe ...

(which took some of Zambia's copper exports for many years with recent interruptions by closures; the rail line is now back in service). The Ndola railhead was responsible for the town becoming the country's centre of distribution. Before the road network was built up in the 1930s, a track from Ndola to Kapalala on the Luapula River, and boat transport from there to the

Chambeshi River The Chambeshi (or Chambezi) River of northeastern Zambia is the most remote headstream of the Congo River (in length) and therefore it is considered the source of the Congo River. (However, by volume of water, the Lualaba River provides a greater ...

was the principal trade route for the Northern Province, which consequently formed part of Ndola's

hinterland Hinterland is a German word meaning "the land behind" (a city, a port, or similar). Its use in English was first documented by the geographer George Chisholm in his ''Handbook of Commercial Geography'' (1888). Originally the term was associate ...

. In 1961, an airplane carrying key

United Nations The United Nations (UN) is an intergovernmental organization whose stated purposes are to maintain international peace and security, develop friendly relations among nations, achieve international cooperation, and be a centre for harmoni ...

figures, including the organisation's second Secretary General Dag Hammarskjöld, crashed on the outskirts of Ndola.

Climate

Ndola has a moderate

humid subtropical climate A humid subtropical climate is a zone of climate characterized by hot and humid summers, and cool to mild winters. These climates normally lie on the southeast side of all continents (except Antarctica), generally between latitudes 25° and 40° ...

(Köppen Cwa).

Industry

Legacy

Once the largest industrial centre of Zambia, boasting, among many high-powered sites, company facilities including a Land Rover vehicle assembly plant, Dunlop Tire manufacture, Johnson & Johnson, and Unilever, Ndola's economy shrank significantly between 1980 and 2000. Many closed factories and plants lie unoccupied in the town. A number of former industries such as clothing and vehicle assembly have disappeared completely. Even though the term 'ghost town' can no longer apply to it, Ndola is yet to regain its economic glory of pre-1980 days.

Refining

There are no mines in Ndola itself, but the Bwana Mkubwa open-cast mine is only 10 km south-east of the city centre. Until their closure,

copper Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pink ...

and

precious metals Precious metals are rare, naturally occurring metallic chemical elements of high economic value. Chemically, the precious metals tend to be less reactive than most elements (see noble metal). They are usually ductile and have a high lu ...

used to be brought from elsewhere in the Copperbelt for processing at the Ndola Copper Refinery and Precious Metals Refinery. Copper exports provide 70–80% of Zambia's export earnings, making the city very important to the country's economy. The Indeni Oil Refinery in Ndola supplies the whole country with refined petroleum. It was repaired in 2001 after being severely damaged by fire in 1999. GL Africa Energy, through its subsidiary Ndola Energy Company Limited, provides 105MW of power to the National Grid of Zambia. Power is generated from

heavy fuel oil Heavy Fuel Oil (HFO) is a category of fuel oils of a tar-like consistency. Also known as bunker fuel, or residual fuel oil, HFO is the result or remnant from the distillation and cracking process of petroleum. For this reason, HFO is contaminate ...

supplied by the Indeni Petroleum refinery.

Commercial

Ndola is home to one of the country's national newspapers, the ''

Times of Zambia The ''Times of Zambia'' is a national daily newspaper published in Zambia and headquartered in Ndola. During the colonial period the newspaper was known firstly as ''The Copperbelt Times'' and then ''The Northern News'' It was a twice-weekly new ...

'', as well as its printer, Printpak. These run as one company called ''TimesPrintpak''. Catholic church run printing press, ''Mission Press'', is also located in Ndola. Mission Press operates as a commercial entity. The headquarters of the Zambia Postal Service Corporation (Zampost) and workers compensation control board are located in Ndola. Zambia's ultra modern stadium in Ndola accommodates most Zambia international sports events. One mark of Ndola's commercial significance to Zambia is shown by the presence of the only major centre of operation for the country's central bank, the

Bank of Zambia The Bank of Zambia (BoZ), is the central bank of Zambia. Overview The principal responsibility of the bank is to create and implement monetary policy that will maintain the economic stability of the country. The Bank is active in promoting financ ...

, outside of the capital, Lusaka. Every major bank in Zambia has at least one branch in Ndola. The largest insurance group in Zambia, ZSIC (pronounced 'zeesk'), own many commercial and residential properties in the city.

Limestone

Ndola has huge

limestone Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms w ...

reserves which are believed to be among the most homogeneous of their kind in the world. Limestone has therefore become to Ndola's economy what copper is to the rest of the country, providing much of the wealth and employment (Lime is a major component in the production of cement; a cement plant getting its lime from limestone and manufacturing a limestone cement will consume well over 80 kg limestone per 100 kg of cement produced). Between 1974 and 2009, Ndola supplied over 50% of Zambia's cement from a plant located some 5 km south-east of the heart of the city. This plant was called Chilanga Cement, Ndola Works. The parent company then was Chilanga Cement plc. Chilanga Cement ran two plants in Zambia: one built in 1949 at Chilanga (hence the parent company name) and the other built in 1969 at Ndola. In 2008, the new holding company, Lafarge Cement Zambia, completed construction of a brand new plant at Chilanga which would produce about double the volume of Ndola Works. By mid-2009, the new plant was still gathering momentum toward full production capacity, leaving Ndola still a significant player in the region's cement industry. Nonetheless, the combination of huge limestone deposits and existing transport infrastructure passing through Ndola has kept the city a very attractive destination for investment into cement production and related activities. A second cement works is under construction in 2008. In June 2009, countrywide advertisements were published to finalise staffing for this new cement plant. Another important processing plant that is based on limestone in the area is Ndola Lime. It is Zambia's sole producer of Lime. Ndola Lime is located near the two cement manufacturing facilities. It supplies the mining industry as well as farmers who require agricultural lime. Ndola Lime company is wholly owned by ZCCM Investment Holdings, a parastatal holdings company via which Zambia's government maintains its active interest in the country's mining and closely related heavy industry.

Cultural Interactions

The four processing plants (the cement plants, the lime plant and Bwana Mkubwa) have mining rights on land located very close to the traditional Chiefdom of Chiwala. Chief Chiwala is therefore a significant interested party to Ndola industry and economics.

Electrical Engineering

Egyptian company Elsewedy Electric joined a consortium of local companies led by ZESCO Ltd (Zambia's electricity supply authority), and established a transformer manufacturing plant and an electrical meter manufacturing plant in Zambia in 2008. Both these facilities are located about 5 km south of Ndola city centre.

Transport

The city is served by the operating sections of the Cape to Cairo Railway. The railway operator

Zambia Railways Zambia Railways (ZR) is the national railway company of Zambia, one of the two major railway organisations in Zambia. The other system is the binational TAZARA Railway (TAZARA) that interconnects with the ZR at Kapiri Mposhi and provides a link t ...

maintains a railway station in Ndola, with passenger and freight services to the cities of

, Livingstone,

Kabwe Kabwe is the capital of the Zambian Central Province and the Kabwe District, with a population estimated at 202,914 at the 2010 census. Named Broken Hill until 1966, it was founded when lead and zinc deposits were discovered in 1902. Kabwe also ...

and

. Freight rail lines ( Cape to Cairo Railway) run to other Copperbelt towns and from Ndola to

Lubumbashi Lubumbashi (former names: (French), ( Dutch)) is the second-largest city in the Democratic Republic of the Congo, located in the country's southeasternmost part, along the border with Zambia. The capital and principal city of the Haut-Katan ...

via

Sakania Sakania is a town in Haut-Katanga Province, in the Congo Pedicle, in the far south of the Democratic Republic of Congo, near the border with Zambia. It is located at an elevation of 1278m asl, therefore it has a cool climate. Between 1935 and 1939 ...

.Terracarta/International Travel Maps, Vancouver Canada: "Zambia, 2nd edition", 2000 Ndola is on the T3 Road, which connects to

in the north-west (as a dual carriageway) and to Kapiri Mposhi and

in the south. The M4 Road connects Ndola to

Mufulira Mufulira, is a town in the Copperbelt Province of Zambia. Mufulira means "Place of Abundance and Peace". The town developed around the Mufulira Copper Mine in the 1930s. The town also serves as the administrative capital of Mufulira District. ...

(and the

Congo Pedicle The Congo Pedicle (at one time referred to as the Zaire Pedicle; in French ', meaning 'Katanga boot') is the southeast salient of the Katanga Province of the Democratic Republic of the Congo, which divides neighbouring Zambia into two lobes. In ...

) in the north.

Simon Mwansa Kapwepwe International Airport Simon Mwansa Kapwepwe International Airport is an international airport located in Ndola, Copperbelt Province, Zambia. It was officially known as Ndola Airport before being renamed in 2011 in honour of Simon Kapwepwe, the nation's former vice ...

, currently located 15 km west of the city centre (adjacent to the Dag Hammarskjöld Crash Site Memorial), has scheduled domestic services to Lusaka and international service to

Addis Ababa Addis Ababa (; am, አዲስ አበባ, , new flower ; also known as , lit. "natural spring" in Oromo), is the capital and largest city of Ethiopia. It is also served as major administrative center of the Oromia Region. In the 2007 census, t ...

Johannesburg Johannesburg ( , , ; Zulu language, Zulu and xh, eGoli ), colloquially known as Jozi, Joburg, or "The City of Gold", is the largest city in South Africa, classified as a Megacity#List of megacities, megacity, and is List of urban areas by p ...

and

Nairobi Nairobi ( ) is the capital and largest city of Kenya. The name is derived from the Maasai phrase ''Enkare Nairobi'', which translates to "place of cool waters", a reference to the Nairobi River which flows through the city. The city proper ...

. It is one of the country's four international airports, others being Livingstone,

and Mfuwe. The oil pipeline from

Dar es Salaam Dar es Salaam (; from ar, دَار السَّلَام, Dâr es-Selâm, lit=Abode of Peace) or commonly known as Dar, is the largest city and financial hub of Tanzania. It is also the capital of Dar es Salaam Region. With a population of over s ...

terminates at the Indeni Oil Refinery in the town. These factors make Ndola the distribution centre of the Copperbelt and northern Zambia.

Sport and recreation

As with many towns on the Copperbelt, Ndola's sports and recreation life was heavily supported by the now disbundled mining conglomerate, Zambia Consolidated Copper Mines Ltd (ZCCM). With the demise of ZCCM, many facilities deteriorated fast. Nevertheless, significant sports places are Ndola Tennis Club (membership), Ndola Swimming Pool (public), the Kanini area (about 3 km from city centre and home to several sports clubs and playing fields like Ndola Wanderers Football Club, a rugby club, and others). About 10 km north-west of the city centre, there is a motor racing track popular with weekend motorbike enthusiasts. The city has several recreational green parks which enjoy a very basic level of maintenance and are open to the public. Of particular significance is the Dag Hammarskjöld Crash Site Memorial located some 10 km west-north-west of Ndola city centre. Dag Hammarskjöld Stadium, which was located on the banks of the Kafubu River south of the city, was razed in the 1980s. Its replacement, in the north-west of the city, is the

with a seating capacity of 50,000. Ndola is home to

Zesco United ZESCO United Football Club (simply often known as ZESCO) is a Zambian professional football club based in Ndola in Zambia, that competes in the Zambia Super League, Founded in 1974. The team plays its home matches at the Levy Mwanawasa Stadium. T ...

, a top-flight team in the Zambia Premier League. Zesco FC is nicknamed "team ya ziko", or the national team in the

Nyanja language Chewa (also known as Nyanja, ) is a Bantu language spoken in much of Southern, Southeast and East Africa, namely the countries of Malawi , where it is an official language, and Mozambique and Zambia. The noun class prefix ''chi-'' is used ...

Suburbs

* Bwana Mkubwa * Chifubu *

Chipulukusu Chipulukusu is an informal settlement and a suburb of Ndola, Zambia (east of the town centre). It is located adjacent to the Zambian railway line and behind an urban area called Northrise. References Ndola {{Zambia-geo-stub ...

*Dola Hill *Hill Crest *Itawa *Kabushi *Kaloko *Kanini *Kansenshi *Kawama *Lubuto *Masala *Minsundu *Mushili *Ndeke *Northrise *Nkwazi *Pamodzi *Twapia

Education

The Northrise University was founded in 2003. The following are some of the education institutions found in Ndola: * Chifubu High School * Copperbelt Nursing Polytechnic * The Copperbelt University School of Medicine * Itawa Basic School * Kansenshi Basic School * Kansenshi Secondary School * Lubuto Secondary School * Masala Secondary School * Ndola College of Biomedical Sciences * Ndola Primary * Ndola Technical School * Northern Technical College * National Institute of Public Administration (NIPA),Ndola campus * Northrise Primary School * St. Andrews High School * Temweni High School

Culture

The Copperbelt Museum, with a collection of gems and minerals from the Copperbelt. Small reservoirs formed by dams on the Kafubu and Itawa streams flowing through the south-east of the city are used for boating and recreation. The thermal power station which dominates the skyline near the railway station, built to power the mines and refineries, ceased operation in the 1960s when the

Kariba Dam The Kariba Dam is a double curvature concrete arch dam in the Kariba Gorge of the Zambezi river basin between Zambia and Zimbabwe. The dam stands tall and long. The dam forms Lake Kariba, which extends for and holds of water. Construction ...

power station came on line.

National monuments

* The Slave Tree or Mukuyu Slave Tree around which Arab

slave trade Slavery and enslavement are both the state and the condition of being a slave—someone forbidden to quit one's service for an enslaver, and who is treated by the enslaver as property. Slavery typically involves slaves being made to perf ...

rs held slave markets in the nineteenth century (a mukuyu tree is a kind of fig tree). It has fallen due to "termites". * Dag Hammarskjöld Memorial ten kilometres west of the city centre, off the Ndola/Kitwe road, commemorates the site where the then

Secretary-General, Dag Hammarskjöld died in a plane crash on September 18, 1961 during the

Congo Crisis The Congo Crisis (french: Crise congolaise, link=no) was a period of political upheaval and conflict between 1960 and 1965 in the Republic of the Congo (today the Democratic Republic of the Congo). The crisis began almost immediately after ...

. * Lake Chilengwa 14 km E of Ndola at 12°58' S 28°45' E, was formed by the collapse of rock into an underlying

cavern, and has local

cultural Culture () is an umbrella term which encompasses the social behavior, institutions, and norms found in human societies, as well as the knowledge, beliefs, arts, laws, customs, capabilities, and habits of the individuals in these groups.T ...

significance.

Places of worship

Among the places of worship, they are predominantly

Christian Christians () are people who follow or adhere to Christianity, a monotheistic Abrahamic religion based on the life and teachings of Jesus Christ. The words ''Christ'' and ''Christian'' derive from the Koine Greek title ''Christós'' (Χρι� ...

churches and temples :

Roman Catholic Diocese of Ndola The Roman Catholic Diocese of Ndola ( la, Ndolaën(sis)) is a diocese located in Ndola, the third largest city in Zambia. History * January 8, 1938: Established as Apostolic Prefecture of Ndola from the Apostolic Prefecture of Broken Hill * ...

(

Catholic Church The Catholic Church, also known as the Roman Catholic Church, is the List of Christian denominations by number of members, largest Christian church, with 1.3 billion baptized Catholics Catholic Church by country, worldwide . It is am ...

), United Church in Zambia (

World Communion of Reformed Churches The World Communion of Reformed Churches (WCRC) is the largest association of Calvinist churches in the world. It has 230 member denominations in 108 countries, together claiming an estimated 80 million people, thus being the fourth-largest Chris ...

Reformed Church in Zambia The Reformed Church in Zambia is among the biggest Reformed churches in the country of Zambia. Origin Zambia, the former Northern Rhodesia, was governed by the British crown. In 1924 it became a British protectorate. The Reformed Church in Zambi ...

(

), Baptist Fellowship of Zambia ( Baptist World Alliance),

Assemblies of God The Assemblies of God (AG), officially the World Assemblies of God Fellowship, is a group of over 144 autonomous self-governing national groupings of churches that together form the world's largest Pentecostal denomination."Assemblies of God". ...

.Britannica
Zambia
britannica.com, USA, accessed on July 7, 2019 There are also

Muslim Muslims ( ar, المسلمون, , ) are people who adhere to Islam, a monotheistic religion belonging to the Abrahamic tradition. They consider the Quran, the foundational religious text of Islam, to be the verbatim word of the God of Abrah ...

mosques.

Sister cities

Aldershot Aldershot () is a town in Hampshire, England. It lies on heathland in the extreme northeast corner of the county, southwest of London. The area is administered by Rushmoor Borough Council. The town has a population of 37,131, while the Alder ...

England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe ...

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and ...

Blantyre Blantyre () is Malawi's centre of finance and commerce, and its second largest city, with an enumerated 800,264 inhabitants . It is sometimes referred to as the commercial and industrial capital of Malawi as opposed to the political capital, L ...

Malawi Malawi (; or aláwi Tumbuka: ''Malaŵi''), officially the Republic of Malawi, is a landlocked country in Southeastern Africa that was formerly known as Nyasaland. It is bordered by Zambia to the west, Tanzania to the north and northe ...

* Bentol,

Liberia Liberia (), officially the Republic of Liberia, is a country on the West African coast. It is bordered by Sierra Leone to Liberia–Sierra Leone border, its northwest, Guinea to Guinea–Liberia border, its north, Ivory Coast to Ivory Coast� ...

Porto Porto or Oporto () is the second-largest city in Portugal, the capital of the Porto District, and one of the Iberian Peninsula's major urban areas. Porto city proper, which is the entire municipality of Porto, is small compared to its metropo ...

Portugal Portugal, officially the Portuguese Republic ( pt, República Portuguesa, links=yes ), is a country whose mainland is located on the Iberian Peninsula of Southwestern Europe, and whose territory also includes the Atlantic archipelagos of th ...

* Regina,

Saskatchewan Saskatchewan ( ; ) is a Provinces and territories of Canada, province in Western Canada, western Canada, bordered on the west by Alberta, on the north by the Northwest Territories, on the east by Manitoba, to the northeast by Nunavut, and on t ...

Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by to ...

* Makhachkala,

Russia Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-ei ...

Harbin Harbin (; mnc, , v=Halbin; ) is a sub-provincial city and the provincial capital and the largest city of Heilongjiang province, People's Republic of China, as well as the second largest city by urban population after Shenyang and largest c ...

Heilongjiang Heilongjiang () Postal romanization, formerly romanized as Heilungkiang, is a Provinces of China, province in northeast China. The standard one-character abbreviation for the province is (). It was formerly romanized as "Heilungkiang". It is th ...

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's List of countries and dependencies by population, most populous country, with a Population of China, population exceeding 1.4 billion, slig ...

Democratic Republic of the Congo The Democratic Republic of the Congo (french: République démocratique du Congo (RDC), colloquially "La RDC" ), informally Congo-Kinshasa, DR Congo, the DRC, the DROC, or the Congo, and formerly and also colloquially Zaire, is a country in ...

Walvis Bay Walvis Bay ( en, lit. Whale Bay; af, Walvisbaai; ger, Walfischbucht or Walfischbai) is a city in Namibia and the name of the bay on which it lies. It is the second largest city in Namibia and the largest coastal city in the country. The ci ...

Namibia Namibia (, ), officially the Republic of Namibia, is a country in Southern Africa. Its western border is the Atlantic Ocean. It shares land borders with Zambia and Angola to the north, Botswana to the east and South Africa to the south and ea ...

References

External links

* {{Authority control Populated places in Copperbelt Province Provincial capitals in Zambia Populated places in Zambia Populated places established in 1904 1904 establishments in the British Empire 1904 establishments in Africa