Automobile exhaust gas that causes respiratory problem is 
is it carbon monoxide or lead ?

Dear student.

Lead and  nitrogen oxides (NOx) are the primary component of automobile exhaust that causes respiratory problems.

Regards.

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carbon monoxide
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co
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Carban monoxide only
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Carbon monoxide
It enters our body and prevent the supply of oxygen to every parts of our body
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Carbon monoxide.
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It is carbon monoxide(CO2).

Hope this helps
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