Discussion Forum : Air Around Us
Question -


Near polluted areas, the percentage of which of the following gases is higher than normal?

Options:
A .   Oxygen
B .   Carbon dioxide
C .   Nitrogen
D .   Argon
Answer: Option B
:
B
Air over industrial cities is polluted. This is due to the emission of carbon dioxide and other harmful gases from the factories and industries in their surroundings. Hence, the percentage of carbon dioxide is more near industrial cities compared to its normal percentage in the atmosphere.

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