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1. 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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    (a) Cleaning of water is a process of removing contaminants.
    (b) Wastewater released by houses is called sewage.
    (c) Dried cow dung is used as manure.
    (d) Drains get blocked by plastic and fats.

Posted by

Sayak

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Pollutants 

Domatic sewage 

Sludge

Oil and fats 

Posted by

Ragni Rathore

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