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
Nigerian Ports Authority and Port Harcourt ports, the initial law also gave it the responsibility of managing harbours and approaches to all ports in the country. By 1963 the firm had grown successfully, it was operating a cargo ship from Lagos to Port Harcourt and also began dredging the Bonny terminal for oil operations. In the same year, the firm issued a £4.3 million loan stock in London. From 1962 - 1968, under the Nigerian Development plan, the length of the quays was expanded and additional warehouses and cargo handling equipment were added. During the Nigerian Civil War that lasted from 1967-1969, only