Carbon monoxide is a primary air pollutant.

I and III

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I and II

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Solution

The correct option is A I and III
Primary air pollutants are those which pollute the air directly as soon as they get released from the source such as ash from a volcanic eruption, the carbon monoxide gas from a motor vehicle exhaust or sulphur dioxide released from factories.

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Describe the major air pollutants. How does carbon monoxide pollute our environment ?

Inhalation of air polluted with carbon monoxide is dangerous because___ .

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