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प्रश्न
Why should we not throw cooking oil and fats down the drain?
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उत्तर
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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संबंधित प्रश्न
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| (d) substance causing temporary hardness | (4) washing soda |
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