Why is the Earth called a unique planet?
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Earth is the only planet in our solar system that has a large amount of liquid water. About 74% of the surface of Earth is covered by liquid or frozen water. Because of this, people sometimes call it the blue planet. Because of its water, Earth is home to millions of species of plants and animals.
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Explanation:
it is the only planet which has an atmosphere in which humans can live.
trees also can only exist in the earth because humans give oxygen and trees give back carbon-dioxide which helps humans breathe. so earth is called a unique planet
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