Air and Water Pollution MCQ App Download | Class 7 Geography PDF e-Book
Class 7 Geography Entrance Tests: Practice Test 2 (Chapter 1)
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The reduce, reuse and recycle principle by which wastes can be reduced is classified as
The Kyoto Protocol agreement signed by participating countries and became legally binding in
The fuel oils and coal are classified as
During the process of photosynthesis, the element that plants give off is
The 'global warming' leads to
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