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 Peter Parker Collection at the Harvey Cushing/John Hay Whitney Medical Library; others are in the Gordon Museum, Guy's Hospital, London. 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