FILE PHOTO: A worker walks past storage tanks at Dangote oil refinery in Ibeju Lekki district, on the outskirts of Lagos, Nigeria August 7, 2019. REUTERS/Temilade Adelaja/File photo
FILE PHOTO: A worker walks past storage tanks at Dangote oil refinery in Ibeju Lekki district, on the outskirts of Lagos, Nigeria August 7, 2019. REUTERS/Temilade Adelaja/File photo