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प्रश्न
What do you understand by the term polluted air?
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उत्तर
When the air contains harmful or undesirable substances, generated by the activities of man or nature, such that their concentration interferes with human health or is injurious to plants or animals, it is said to be polluted air.
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संबंधित प्रश्न
Complete and balance the following chemical equation.
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Tick (√) the most appropriate answer.
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