Adam Nossiter Nyt News Service

Big oil spills are no longer news in this vast, tropical land. The Niger Delta, where the wealth underground is out of all proportion with the poverty on the surface, has endured the equivalent of the Exxon Valdez spill every year for 50 years by some estimates.

Big oil spills are no longer news in this vast, tropical land. The Niger Delta, where the wealth underground is out of all proportion with the poverty on the surface, has endured the equivalent of the Exxon Valdez spill every year for 50 years by some estimates.