Amnesty : Oil spill in Niger Delta creating ` ` human rights tragedy '' People living in Niger Delta have to drink , cook , wash in polluted water , it says . Nigeria 's largest oil company : Local communities causing much of the damage . Niger Delta a region in Nigeria consisting of nine oil - producing states .
Amnesty : Oil industry in Niger Delta creating `` human rights tragedy '' People living in Niger Delta have to drink , cook , wash in polluted water , it says . Nigeria 's state oil company : Local communities causing much of the damage . Niger Delta a region in Nigeria consisting of nine oil-producing states .