Nigeria's Natural Resources
Nigeria is the 12th largest producer of petroleum in the world, the 8th largest exporter, and has the 10th largest proven reserves. Petroleum plays a large role in the Nigerian economy, accounting for 40% of GDP and 80% of government earnings.
Source: https://en.wikipedia.org/wiki/Geography_of_Nigeria
Source: https://en.wikipedia.org/wiki/Geography_of_Nigeria