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The second 'P' stands for 'population'

Hilda the hippo The growth of the human population is the biggest threat to natural environments today.

One hundred years ago, there were one billion people in the world. Now there are over six billion!

Quite simply, there isn't enough room for natural environments to coexist with all these people, and the land they need to provide them with food and shelter.

What was the world's population when you were born? And how quickly is it increasing? These are important questions for people who want to conserve endangered species. Discover the answers, by followng the link given below.

See the world's population grow

Return to the hippo and learn more about the other causes of extinction.