Barring any fuel leaks I would say that your charcoal canister is probably in need of replacement. they can fill up with liquid after some time making them useless and will smell of gas.
Also it may be an exhaust leak if it is not an actual gasoline smell.
Your heater core may have a leak in it, allowing the fumes to invade the inside of the vehicle.
No they don't smell like anything
are you definitely sure it smells like gas? because sometimes your car can smell really bad, and that's caused by a petrol spill on the engine that gets burnt while you're driving. i think you should definitely get it checked out by a mechanic though, just incase its something serious.
smells like banana and its can give you a headache due to the nitroglycerine fumes ect...
sounds like an exhaust leak, or a fuel leak. that depends on the smell.
A "smell" is added to propane the same as a "smell" is added to natural gas. Some people describe it as being like old cabbage. I can attest that it is not pleasant and unless you have very poor sense of smell you will notice it. Don't ignore it if you do. Propane is heavier than air and will lie in a low area and is very combustible.
No. In fact marijuana cleans the air just like a tree does. The "fumes" as you say , is nothing more than a smell.
If you can smell gas it's very likely you have a leak somewhere. Even a small leak will produce noticeable fumes.
Well, it's hot so you can smell the heat (If you've ever been abroad before, you will understand) Also fumes+Sea Beautiful Country!! :)
Antimony itself does not have a distinct smell. However, when heated or burned, it can produce a garlic-like odor due to the release of antimony trioxide fumes. This odor is often described as musty or sweet.
nuthing
Sweat, shame, and semen.