Each year a large amount of plant material, cellulose, is deposited on the surface of Planet Earth. What are the natural processes this cellulose undergoes before yielding carbon dioxide, water and other end products? (Answer in 150 words)

2Mediummains15 marks

Conservation, environmental pollution and degradation, environmental impact assessment

Discuss global warming and mention its effects on the global climate. Explain the control measures to bring down the level of greenhouse gases which cause global warming, in the light of the Kyoto Protocol, 1997. (Answer in 250 words)

3Mediummains15 marks

Salient features of world's physical geography

Mention the significance of straits and isthmus in international trade. (Answer in 250 words)

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