NCERT Solutions for Class 7 विज्ञान Chapter 18 अपशिष्ट जल की कहानी (Hindi Medium)
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Book Name: विज्ञान
Chapter Number: 18
Chapter Name: अपशिष्ट जल की कहानी
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The National Council of Educational Research and Training (NCERT) is an autonomous organisation set up in 1961 by the Government of India to assist and advise the Central and State Governments on policies and programmes for qualitative improvement in school education.