Question

Why do we say that planet earth is unique ?

Answer 1

Answer:

The Earth is known as a unique planet as life exists on it. ... The Earth has an atmosphere which is made up of gases like oxygen, nitrogen and carbon dioxide. While the Ozone layer prevents the harmful rays of the Sun from entering into the Earth, carbon dioxide traps the Sun's heat, keeping the planet warm.

Answer 2

Answer:

because it is only planet in which life can exist and it is only planet in which oxygen and water is present which is important for existence of life..