Gas or carbon monoxide.Carbon monoxide is odorless , and if you have a leak, and you windows are up, it can make you sick or kill you. If you feel sick to your stomach, sudden onset headache or nausea ONLY when you are in the car, have it checked immediately. It may also make you drowsy. NEVER keep the motor running in cold weather unless you are SURE nothing is blocking your tailpipe, like snow. Be very careful with babies or small children , as they are most susceptible.
Exhause Fumes.
Car fumes are not very good for the environment and can cause global warming.
After you are dead car fumes (exhaust) does not do anything to your body. However, if while you are alive you are exposed to car fumes in a small, poorly ventilated space, you may become dead.
You Can't
Exhaust
no
The fumes are flammable just like gasoline fumes.
No who, but what. All internal combustion engines emit exhaust fumes.
Yes
Death.
No
yes