If you will be alive by 2100, you may be one of the 10 billion people on the Earth. Today, Earth already holds 7 billion people. In a new published by the United Nations, the world's population is set to rise to at least 10 billion by 2100, but could top 15 billion.
In a report ahead of ceremonies on October 31 to mark the seven billionth human alive today, the UN Population Fund (UNFPA) warned demographic pressure posed mighty challenges for easing poverty and conserving the environment.