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The Niger Delta is Africa's biggest oil producing region. It has also become a security and environmental nightmare thanks to dozens of spills and theft by armed rebels.

Oil and gas giant Shell has long been criticised for its operations in the region. Igo Weli, one of the company's directors in Nigeria, tells Manuela Saragosa how the threat of violence makes it hard for them to clean up their act.

But while Shell claims it is trying its best in challenging circumstances, Mark Dummett of Amnesty International says the company could be doing a lot more and is still under-reporting the extent of the problem. Manuela also speaks to Jumoke Ajayi of Nigerian oil conglomerate Sahara Group, and Erabanabari Kobah, who acts as a spokesperson for one of the Niger Delta communities.

Producer: Laurence Knight

(Picture: A member of the Nigerian navy forces patrols on an abandoned site of an illegal oil refinery in the Niger Delta region; Credit: Stefan Heunis/AFP/Getty Images)