The Threat to the World Population

CNN's John Sutter looks at where the world is growing and which countries aren't. He says Africa will be the largest driver of global population growth for decades to come. By 2100, five African nations are expected to join India, China, and the US among the world's 10 most populous country with Nigeria projected to reach a population of half a billion before 2080. The US is going to sink down from number three to number six or seven behind Nigeria, Pakistan and Dominican.