Fill in the blanks:

(a) Cleaning of water is a process of removing ___.

(b) Wastewater released by houses is called .

(c) Dried _ is used as manure.

(d) Drains get blocked by and __.

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Solution

(a) Cleaning of water is a process of removing pollutants.

(b) Wastewater released by houses is called sewage.

(c) Dried sludge is used as manure.

(d) Drains get blocked by cooking oil and fats.

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Wastewater released by houses is called ___

Wastewater released by houses is called sewage.

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