Class 7 Notes
Class 7 Science Notes Chapter 18 (Wastewater Story) – Science Book
Okay, here are the detailed notes for NCERT Class 7 Science Chapter 18: Wastewater Story, focusing on aspects relevant for government exam preparation. Chapter 18: Wastewater Story - Detailed Notes for Exam Preparation 1. Introduction: Water - Our Lifeline * Clean water is a basic human need. * Water gets dirty after