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प्रश्न
The components of air which are harmful to living beings are ______.
विकल्प
nitrogen and carbon dioxide.
dust and water vapour.
dust and smoke.
smoke and water vapour.
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उत्तर
The components of air which are harmful to living beings are dust and smoke.
Explanation:
Dust and smoke are harmful to living beings because if they enter our body, they can cause respiratory problems.
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