The population of the world has reached a historical milestone hitting eight billion people, according to the United Nations (UN).
According to the UN, much of the world's population growth is coming from developing nations in the African continent. Chief among them is Nigeria which is expected to see its population of 216 million soar to 375 million over the next three decades, the UN says.
This could skyrocket Nigeria into the fourth-most populous country in the world, lagging only behind India, China, and the United States of America.
