All water on a surface of our planet forms an environment named as hydrosphere. The hydrosphere occupies the biggest part of its surface: more than 380 million km2, or more than 75 % (its general area is about 510 million km2).
The characteristics of hydrosphere is usually begun from figure of 361,2 million km2 that is claimed to be the area of the surface of the Earth that is covered with water. But that is only the area of the seas and oceans, and all hydrosphere occupies larger territory. Read more
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