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Why are open drains a concern? - Science

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Question

Why are open drains a concern?

Answer in Brief

Solution

Drains that are not covered may get blocked with solid wastes like plastic bags, rags and gravel. Such drains are flooded with dirty water that stagnates and is polluted emitting foul smells and providing breeding grounds to various microbes. Mosquitoes lay eggs and breed causing the spread of diseases like malaria and dengue. Sewage wastes also carry germs that cause serious waterborne diseases like cholera, typhoid, dysentery and jaundice.

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Chapter 18: Wastewater Story - VERY SHORT ANSWER QUESTIONS [Page 94]

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NCERT Exemplar Science [English] Class 7
Chapter 18 Wastewater Story
VERY SHORT ANSWER QUESTIONS | Q 11. | Page 94
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