Air and Water Pollution MCQ App Download - Grade 7 Geography e-Book
Class 7 Geography MCQs - Chapter 1
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The Chlorofluorocarbon (CFC) remains in atmosphere for
The waste which takes 1 month to be decomposed in landfill is
The continent whose rivers are most polluted in world is
The causes of air pollution includes
According to World Health Organization, the percentage of the deaths due to environmental factors is
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