The world population is growing rapidly, if it comes back to 200 years ago, according to an estimated world population of less than 1 billion, the world population today is more than 7 billion . Rapid population growth has become a major concern as countless social and ecological problems have become increasingly alarming.

Let's take a look at a few numbers, causes and consequences as well as how to make the world better and better.

Looking back at the past, present and future world population images 1
Looking back at the past, present and future world population images 2
Looking back at the past, present and future world population images 3
Looking back at the past, present and future world population images 4

  • Video: World population development history
  • Only 3 of the 7 billion people in the world have a special red passport