Eyewitness News | Fall of crude oil prices is 'totally unacceptable' - Buhari Eyewitness News Nigeria, Africa's biggest oil producer which earns around 90 percent of its foreign exchange earnings from crude oil exports, has been hit hard by the erosion of vital revenues caused by the global slump in oil prices which has also hammered its currency. Why current oil prices are unacceptable Buhari to OPEC: Oil price crash unacceptable Current oil prices 'unacceptable,' Nigerian president tells Qatar's Emir |