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,
Lam Qua Lam Qua Lam Qua (; 1801–1860), or Kwan Kiu Cheong (), was a Chinese painter from the Canton province in Qing Dynasty China, who specialized in Western-style portraits intended largely for Western clients. Lam Qua was the first Chinese portrait painter to be exhibited in the West. He is known for his medical portraiture, and for his portraits of Western and Chinese merchants in Canton and Macau. He had a workshop in 'New China Street' among the Thirteen Factories in Canton. In the 1820s, Lam Qua is said by some contemporaries to have studied with George Chinnery, the first English