Question

.. Why is the earth called the 'Blue Planet'?
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Answer 1

Answer:

Planet Earth has been called the "Blue Planet" due to the abundant water on its surface. Here on Earth, we take liquid water for granted; after all, our bodies are mostly made of water.

Answer 2

Answer:

Planet Earth has been called the "Blue Planet" due to the abundant water on its surface. ... Liquid water covers most of the surface of our planet. because in our earth 71% is covered with water and 29% land