Lagos

=== Oil refinery ===
{{Main|Dangote Refinery}}

[[File:Dangote oct-2022.jpg|thumb|Dangote refinery as of October 2022]]
For decades, there was no oil processing industry in Nigeria, apart from illegal refineries in the Niger Delta (which are very polluting due to the lack of [[Cracking (chemistry)|cracking]]). Nigeria therefore had to have the end products of domestic crude oil such as [[fuel]]s, [[bitumen]], [[Paraffin (fuel)|paraffin]], [[motor oil]], [[polypropylene]] etc. produced in US or European refineries, with transport costs over thousands of nautical miles and margins for middlemen. The oil refinery in Lekki went into operation in December 2023<ref>{{Cite web |last=AriseNews |date=2023-12-28 |title=Dangote Refinery Receives Third Crude Shipment Of 1 Million Barrels, To Start Diesel and Aviation Fuel Production Mid-January 2024 |url=https://www.arise.tv/dangote-refinery-22receives-third-crude-shipment-of-1-million-barrels-to-start-diesel-and-aviation-fuel-production-mid-january-2024/ |access-date=2024-01-03 |website=Arise News |language=en-US}}</ref> and is expected to process 650,000 barrels of oil per day when fully operational, making it the seventh largest oil refinery in the world.<ref>{{Cite web |title=oilandgasclub |url=https://www.oilandgasclub.com/worlds-largest-refineries |access-date=2024-01-03 |website=www.oilandgasclub.com}}</ref> By comparison, the largest refinery in the United Kingdom in [[Fawley Refinery|Fawley]] processes 270,000 barrels a day, while the biggest US refinery in Port Arthur, Texas, processes 607,000 barrels a day.<ref>{{Cite web |last=Villanueva |first=Laurie |date=2022-01-04 |title=4 of Nation's 10 Largest Oil Refineries Located Along Texas Gulf Coast |url=https://www.zehllaw.com/4-of-10-largest-us-oil-chemical-refineries-located-in-houston-beaumont-port-arthur/ |access-date=2024-01-03 |website=Zehl & Associates |language=en-US}}</ref> 57,000 people have been hired.<ref>{{Cite web |last=Adenuga |first=Adepeju |date=2021-09-06 |title=Dangote refinery to increase workforce to 57,000 |url=https://punchng.com/dangote-refinery-to-increase-workforce-to-57000/ |access-date=2024-01-03 |website=Punch Newspapers |language=en-US}}</ref>