PoliticsNigerian and Angolan state oil companies rush to extract value of oil and gas resourcesTop executives at the Nigerian National Petroleum Corporation and Sonangol outline energy transition goals at IHS CeraWeekVital cashflow: Fields like Total's Kaombo off Angola will be vital to fund Luanda's efforts to slowly switch away from fossil fuels.Photo: AFP/SCANPIXIain EsauLondon