28. Replace the following with a word or a phrase.
h. water infected with undesirable germs and wastes

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Solution

Water gets contaminated when certain undesirable germs, industrial and agricultural wastes, etc are mixed with it.
This water is unfit for drinking and other purposes like washing, cooking, bathing, etc.
Contaminated water is very harmful to human health.
Hence, contaminated water is infected with undesirable germs and wastes.

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