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Question

Which of the following pollutants is not harmful for lungs?

A
CO
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B
CO2
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C
SO2
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D
NO2
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Solution

The correct option is B CO2
The main components of gaseous pollutants are carbon monoxide, sulpur dioxide, nitrogen oxide. All of these pollutants damage lungs as when we breathe this dirty air, these pollutants enter directly deep into our lungs causing respiratory diseases and lung cancer.

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