4. Answer in short: (any 4)
1. What is pollution?
II. Name the different types of pollution?
III. Who founded Arya Samaj?
IV. Which university was founded by Sir Syed Ahmed Khan?
V. Mention any two ways to reduce soil pollution?
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baccha exam chalu hai naa tho exam he likh copy nhi karne ka
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the action of making the air, water, etc. dirty and dangerous
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