Nigerian National Petroleum Corporation (NNPC) is responsible for harnessing Nigeria's oil and gas reserves for sustainable national development. It explores, produces, refines oil, and markets and retails petroleum products. It is also involved in petrochemicals and gas development, oil and gas engineering, the supervision of government investments in the upstream sector, and the marketing of Nigeria's accruable crude. It is implementing a renewable energy initiative which links the industry with the agricultural sector to produce ethanol.