Air and Water Pollution Quiz App Download - Grade 7 Geography e-Book
Class 7 Geography MCQs - Chapter 1
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The large number of organisms can die if there is
The waste which takes 3 to 4 weeks to be decomposed in landfill is
The waste which takes 80 to 100 years to be decomposed in landfill is
The layer of atmosphere that absorbs ultraviolet rays from Sun is called
The air condition equipment, leaking refrigerators, spray cans and burning of plastic foams release
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