DAV class 7 SST chapter 2 chapter name The Earth and the changes on it.
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Earth is third nearest planet to sun and fifth number on size. it called blue planet because 2/3 part cover with water and geoid in the shape and it only one planet where people survive air , water available . Many reasons for change occurs in earth , global warming increasing the temperature of earth and harmful gases create the hole in stratosphere and melting of ice region is very rapid .
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just last page is left i am sending last page on ur next questions
I am also from dav school class 7th
I am from srdav
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