Chemistry
The constituents of automobile exhaust that can cause cancer is/are :

Lead
Polycyclic hydrocarbons
Oxides of nitrogen
Carbon monoxide

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Chemistry
Man dies in the atmosphere of CO, because it

Combines with the haemoglobin of blood, thereby making the later incapable of absorbing O2
Dries up the blood
Combines with O2 present in the body
Reduces the organic matter of tissues

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