usually an exhaust leak under the hood(exhaust manifold or o ring/flex pipe that fastens to solid pipe).your car pulls air from the front windshield area,and it seeps into it and blows in
it depend on the car and how old it is it could lead to wore things
Exhause Fumes.
Car fumes are not very good for the environment and can cause global warming.
Headache and nausea
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
no
Exhaust
The fumes are flammable just like gasoline fumes.
No who, but what. All internal combustion engines emit exhaust fumes.
Yes
Generally a hold in the muffler will make your car sound excessively loud. Carbon Monoxide may also fill the cab of your car or truck and you should have it repaired as soon as possible to avoid exposure to lethal fumes.