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
Brass River River, had contributed towards building an iron church. It was opened on 9 October 1884 in presence of the congregation of 1,202 people. The congregation of St. Barnabas at Tawn, Brass River, had started to raise contributions for a similar iron church. At one time the town of Twon-Brass was the main port of the Nembe Kingdom, called by one historian "the Venice of the Niger Delta", and was dominant in the palm oil trade of the region. When the Royal Niger Company became an increasingly strong rival in the trade, the town's economy was severely damaged. In January 1895