Petro-chemical industries are located in the Rivers State of Nigeria because of ________?

Many Nigerians perceive the Niger Delta as synonymous with the oil producing areas of Nigeria.
In other words, the Niger Delta includes the states of Abia, Akwa Ibom, Bayelsa, Cross River,
Delta, Edo, Imo, Ondo and Rivers.
The region is blessed with abundance of human and physical resources, including the majority of
Nigeria's oil and gas deposits, good agricultural lands, extensive forests, excellent fisheries, as well
as with a well-developed industrial base.
The Niger Delta region of Nigeria is richly endowed with natural resources with oil and gas accounting for over 85% of the Nation's gross domestic product (GDP); over 95% of the National budget; and over 80% of the national wealth.