yup, sign of a bad heater core
The "fumes" are more than likely antifreeze from a leaky heater core.
Antifreeze fumes can be toxic. Breathing them can cause health problems. If your vehicle is leaking coolant, especially from the heater core use care and repair the leak as soon as possible.
No it is not a good thing to do!
One possible side effect is death.
yes, if you breath in the fumes they can cause lung cancer so don't breath them in after cooking
So you can be healthy and not breathe in deadly fumes.
yes you can because it is not good for you to breathe on
Yes, but don't breathe the fumes.
Do not breathe from a tail pipe. Exhaust fumes contain many componentst that will kill you if to much is inhaled.
You can get dizzy and pass out. You can also become sick to your stomach. If you breathe too many fumes into your lungs it can cause problems.
because so they dont breathe in the fumes of the trains they go on.