Why is the earth considered a unique planet?

Related questions

1. How Ozone is formed in the troposphere?
2. Is Earth losing its atmosphere?
3. What is in the thermosphere layer?
4. How high is the Karman line?
5. Where did Earth's water originate?
6. What is the atmosphere like on Earth?
7. Why is the earth known as Blue Planet?
8. What is atmosphere short answer?
9. How did water get on earth?
10. Did Mars ever have a magnetic field?

Tags

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2. #people
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4. #surface
5. #large
6. #animals
7. #because
8. #frozen
9. #amount
10. #planet
11. #earth
12. #species
13. #water
14. #about
15. #system
16. #sometimes
17. #covered
18. #solar
19. #plants