Wastewater Story - Complete Chapter | Mindmap with Explanation | Class 7

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Welcome to this episode of our new series "Crash Course” .
In this session Kriti ma’am will be taking a session on complete chapter 18 “Wastewater Story” of class 7 in 20 minutes. Not only this, at the end of the session, she will give you 10 Most Important objective questions as homework.
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