<prompt> Bhala okuqhubekayo kwalesi sigaba - Iminyaka engaphezu kwengu-50, kwakugeleza uwoyela minyaka yonke eNiger Delta, kodwa kwakungenziwa lutho ukuze kuvinjelwe ukuchitheka okusha. Lokhu kungcoliswa akuzange kuhlanzwe, ngaleyondlela kwashiya amanzi engasaphuzeki, izwe lingatheli futhi kwabangela ukufa kwezilwane zasendle nezilwane zasemanzini. Lezi zimo zaqhathaniswa nokuchitheka kukawoyela we - BP eGulf of Mexico  <response>: . futhi. 