Also, the nine oil-producing states of the Niger Delta receive 13 per cent revenue as derivation to compensate for ecological damage of oil production in the region.
Haka zalika, jahohi tara masu arziqin man fetur na yankin Niger-Delta su na karvar kaso 13 cikin xari na kuxaxen man fetur domin magance matsalar gurvacewar yanayi a yankin.