Africa's Urban Future

By the end of this century, the UN predicts that Africa, which had less than one-tenth of the world's population in 1950, will be home to almost 4 billion people, or 40% of humanity. Most of this staggering demographic growth will take place in Africa's cities, and the question of how the continent manages the fastest urbanisation in human history will not only affect the daily lives of the millions of Africans, but shape everything from migration and global economic prosperity to the future of the African nation state and the prospects for limiting climate crisis. In this BBC World Service series, Mike Wooldridge reports on the opportunities and challenges these breakneck developments present for Africa, and the rest of the world.