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Why should we not throw cooking oil and fats down the drain?

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Question

Why should we not throw cooking oil and fats down the drain?

Short Answer
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Solution

Cooking oil and fats should not be disposed of off down the drains as these get harden and block pipes. They reduce the flow of water and result in stagnant water, which provides a breeding ground for mosquitoes and flies and spreads infectious diseases.

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Chapter 18: Wastewater Story - SHORT ANSWER QUESTIONS [Page 95]

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NCERT Exemplar Science [English] Class 7
Chapter 18 Wastewater Story
SHORT ANSWER QUESTIONS | Q 18. (b) | Page 95

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