Carbon monoxide, nitrogen dioxide, sulfur dioxide, particulate matter (basically soot), benzene, formaldehyde, and polycyclic hydrocarbons are the ones I know of. And (mainly) carbon dioxide and water (steam).
Cars do indeed produce exhaust, but they are not the only source of exhaust which can come form other forms of transport, house boilers and factories.
exhaust fumes of a car
Cars do not have anything in their exhaust to reduce carbon monoxide. A Catalytic Convertor in the Exhaust System is used to remove Carbon Monoxide from the exhaust gasses.
exhaust is spewed from cars and trucks.
Exhaust
do cars exhaust? yes
yes
Improve appearance
to decrease exhaust noise
because your gas tank is in the center
Many cars may have a version that includes a diesel exhaust system. Typically, these are trucks or large cars that need the extra power to continue driving.
Mainly exhaust from cars.