It seems like everyone's missing the boat on this one.
You don't have to be reticent about confronting your neighbors, or your landlord about improving the situation in your apartment. You have every right, and a reasonable expectation of satisfactory living in any tenement. This includes proper ventilation.
I think you'll feel better if you do something about it, or at least try. If you do so, just realize that you may have limited results. But I think you'll feel better if you try.
I once had a noise situation in my apartment. Some vatos would go to pick up their daughter at their grandmother's apartment which was next to mine. They would never get out of their car and ring the doorbell like normal people, but would sit outside and honk the horn low-rider style for her to come out. (They would lean on the horn the whole time.) It was bad enough when they had a broken horn, but it became intollerable when they installed a brand new horn that was VERY LOUD!
So at first I went outside, and politely asked them to stop. They found this very amusing. I did it again, staying polite, and got some eye-rolling. I did it a third time, and realizing that I was going to always pester them about it the mother got out of the car and started cussing me out Hispanic style saying the F-word, every other sentence. ....Now I knew I was getting somewhere. Next time when they honked the horn, I called the police. The police got there pronto and heard this ridiculous woman pitching a fit over a simple request to not honk her horn. The officer calmed her down, and gave her a warning. He also told me about two ordinances making it a finable offense to honk ones horn in that manner. One was a $60 fine, for unwarranted noise. The other one was a more hefty $200 moving violation, for failing to use the horn as a safety device, which is by law the only thing it was intended for. He explained that she had been warned, and that if the problem continued, I should file a complaint.
...Ok, so this worked for a while. The crazy lady stopped honking her horn and started going to the door like a normal human being. It was all good. Until her retarded brain forgot, and then she started doing it again.
So when I went outside to resume our little "negotiations". It took all of my self control to not go ballistic. I gave the mother a "what's the deal" sign with my hands, to see if she'd forgotten our unspoken agreement. With her daughter in the car, she looked away without saying a word and drove off.
I realized that I was probably going to have to take her to court. I really had better things to do. But that's life. So before doing so, I did one last thing to ensure the Police would know that I was being totally reasonable. I went down to Radio Shack and bought a little remote doorbell chime that worked up to a 100 meters. The next time she came up, with her gazillion other kids in the car, I pranced out in the street like a little homo to propose my solution. I bent my knees down so that I was at eye level and politely said "Hey, I got this solution to show you." She was a little suspicious, but listened while I pulled the remote door buzzer out. I politely offered it to her, and explained that now she could notify her Daughter/Mother that she was there without getting out of the car, and at the same time not disturb the neighbors. ...She laughed, and so did her kids. But it was more of a polite laugh. She said, "You're crazy!", but not necessarily in a bad way, and I smiled back. But she then had the chutzpah to tell me that this solution was no good, because she had more than one car, and might not have it in the other car. She loaded her daughter in the car, and drove off.
Alright. I went down to the Police Station to file a complaint. I brought my little door buzzer, and explained how I had tried politely to improve the situation every way that I knew possible. I explained how an officer had warned her, and told me about the two ordinances, and that since the problem was continuing, I'd like to file a complaint. The cops were beside themselves. They were knee-slapping laughing in hysterics when I showed them the remote door buzzer. They started trying it out, and one of the officers when upstairs to the far side of the building while the other one rang it, curious to see if it would really work. ...It did. They had rarely seen anyone be so reasonable, and were used to breaking up fights over noise. They gladly helped me file the complaint, and I was on my way letting them deal with it.
The story doesn't end there. Suffice it to say, I had to show up in court to explain to the judge my side of the story. And the lady didn't show up, but her ancient father did, since the car was registered in his name. The judge had to get the daughters information from the father, and issued another warrant. I was told I'd have to appear in court one more time when the proper defendant was there, but accepted it as part of the process.
Magically, about two weeks later, the honking stopped. I never had to appear in court a second time. The lady chose to pay the fine, and modify her behavior. I slept the good sleep of the victorious and greatly enjoyed the outcome. I think the whole thing took about 2-3 months from the time I decided to do something about it.
My point is this. When she honked her horn, and I wasn't pursuing a solution, I felt like throwing a brick down onto the windshield of her car. My blood pressure spiked. But as soon as I started to do something, I felt better, and it was just a matter of time, and pursuing a solution that was reasonable.
I was always persistant, and always respectful. I didn't want her thinking I was trying to establish dominance or a pecking order. I was just looking to a solution to a problem. And I left it up to the authorities to make the final judgement in deciding what was the reasonable solution.
Anyways, I think you should GO talk to your townhall. That's what they're there for. Most have a department or office to handle Landlord/Tenant issues. They'll have helpful free advice, and tell you what the law will or won't do. There really might be some ordinance already that might help. Environmental Indoor Air Quality assessments run around $1500-$3000. The town may require "unknown odors" to have such a test, so the landlord should really want to do everything possible to resolve the situation and treat the problem seriously. (Don't tell them you're veg*n. They hate us. We want to give terrorists hugs. Instead tell them you're having a ventillation problem.)
I guess you're moving, but such problems are common everywhere, and I would encourage you to do it for the experience. Everyone should know how to use the system to resolve disputes. ...It may not work, but then still at least you tried.