why is usable water so scares on the earth?
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Answer:
Economic water scarcity is caused by a lack of investment in infrastructure or technology to draw water from rivers, aquifers or other water sources, or insufficient human capacity to satisfy the demand for water. One-quarter of the world's population is affected by economic water scarcity.
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Explanation:
Avout 71% of earth is covered by water but only 1% is usable because the rest 70% is ocean water which contains a high amount of salt in it and there aren't any effective ways to remove the salt from ocean water which makes it useless for humans.
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