Question

________ , ________ of water is the main cause of water scarcity .​

Answer 1

pollution , overuse of water is the main causes of water scarcity.

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Answer 2

Answer:

Contamination, wastage of water is the main cause of water scarcity.

Explanation:

$\rightarrow$ Polluting the water contimates it, due to which that water could not be used and is ignored.

$\rightarrow$ Excess usage of water causes the water to finish away which leads to droughts.