Question

Why 97% of the water on the earth cannot be used by human beings?​

Answer 1

Answer:

Oceans, which are the largest source of surface water, comprise approximately 97 percent of the Earth's surface water. However, since the oceans have high salinity, the water is not useful as drinking water. Efforts have been made to remove the salt from the water (desalination), but this is a very costly endeavor.

Explanation:

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Answer 2

Answer:

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More than two-thirds of the planet's freshwater is not even liquid—it's frozen in glaciers in places like the Antarctic and Greenland ice sheets. These resources are mostly inaccessible for human use, though glacial meltwater is an important resource in some regions.

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