Nigeria plans to spend $20-billion on infrastructure over the next ten years and will introduce an infrastructure bond in 2019 as Africa’s biggest oil producer seeks to address challenges in revenue generation. “Our target is that we’d like to see infrastructure spending increase to the $10-billion to $20-billion range over the next five to ten years because we think that’s the level of our need,” Okechukwu Enelamah, the Minister for trade and investment, told reporters on Wednesday in the capital, Abuja.