World population has grown over 4,5 billion in last 60 years. Now, there is one birth every 8 seconds and one death every 12 seconds in the world. Projected world population in 2050 is about 10 billion. Can you imagine what it would look like if all people lived in one city? Watch the video below.
Credits: RealLifeLore, flickr.com/photos/jamescridland/613445810