Petroleum industry in Nigeria to transport the crude oil. Also because of the lack of highly productive fields, money from the jointly operated (with the federal government) companies is constantly directed towards petroleum exploration and production. Nigeria's petroleum is classified mostly as "light" and "sweet", as the oil is largely free of sulphur. Nigeria is the largest producer of sweet oil in OPEC. This sweet oil is similar in composition to petroleum extracted from the North Sea. This crude oil is known as "Bonny light". Names of other Nigerian crudes, all of which are named according to export terminal, are Qua Ibo, Escravos blend,
Brass River river's slave trade. James Holman visited the Guinea coast during his 1827−32 voyage round the world. Holman observed that all the rivers between the Bonny and Cape Formosa communicate with each other in the interior, and all were navigable by canoes. He wrote, In June 1830 the explorer Richard Lemon Lander and this brother John reached Bussa on the Niger, the place where Mungo Park had died. After exploring the region, they started down the Niger on 20 September 1830, and reached Brass Town on 14 November 1830. Brass Town at this time was built on a large creek, which