Economy of Nigeria imports a significant amount of food to sustain itself. However, efforts are being made towards making the country food sufficient again. Nigeria's proven oil reserves are estimated to be ; natural gas reserves are well over . Nigeria is a member of the Organization of Petroleum Exporting Countries (OPEC). The types of crude oil exported by Nigeria are Bonny light oil, Forcados crude oil, Qua Ibo crude oil and Brass River crude oil. Poor corporate relations with indigenous communities, vandalism of oil infrastructure, severe ecological damage, and personal security problems throughout the Niger Delta oil-producing region continue to plague Nigeria's
Lam Qua painter to settle in China – although Chinnery himself denied this. Lam Qua became well-known and skilled in Chinnery's style of portraiture. He developed a following among the international community, and undercut Chinnery's prices. From 1836 to 1855, Lam Qua produced a series of medical portraits of patients under treatment with physician Peter Parker, a medical missionary from the United States. Parker commissioned Lam Qua to paint pre-operative portraits of patients who had large tumors or other major deformities. Some of the paintings are now part of a collection of Lam Qua's work held by the Yale University in the