Research by the World Conservation Union and Nigerian government agencies indicate that on average every year over the past 50 years the oil spilled in Nigeria has been equivalent to the Exxon Valdez spill in Alaska.
Ucwaningo olwenziwe yi-World Conservation Union nezinhlaka zikahulumeni waseNigeria lukhombisa ukuthi ngokwesilinganiso unyaka ngamunye kule minyaka engama-50 edlule uwoyela owachitheka eNigeria ubulingana nokuchithwa kwe-Exxon Valdez ka-1989 e-Alaska.