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question_answer1) Define natural resources.
question_answer2) What percentage of the earth's surface is land and how much of it can man use?
question_answer3) Mention three uses of land.
question_answer4) What do you mean by land degradation?
question_answer5) What are the ways of saving water?
question_answer6) Define the term 'derelict land'.
question_answer7) How can we conserve our vegetation and wildlife?
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