Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Nigerian Activists Offer Mixed Reactions on Oil Cleanup Project in Niger Delta Chika Oduah ENUGU, NIGERIA - The Niger Delta is where Africa's largest oil producer pumps out its most lucrative natural resource. But while companies like Shell and ExxonMobile operate there and extract billions of dollars worth of crude oil, most of the people in the region are extremely poor. Their traditional livelihoods as farmers and fishermen have been badly affected by more than 6,000 oil spills that have damaged the environment over the past 50 years. .