8 Billion People Now Live on Earth

The world's population has reached a staggering 8 billion, according to estimates from the United Nations. One billion people have been born in the last 11 years. UN officials say the unprecedented growth boils down to two parallel trends: the gradual increase in average human longevity due to advances in public health and nutrition, personal hygiene and medicine, as well as high levels of fertility in many countries. Inside Edition Digital’s Stephanie Officer has more.