It appears that the good air comes from the north here, while winds from the south bring a peculiarly acrid air. I've been in some difficult places in the winter (3x -4x the levels of emergency levels of pollution stateside--HEPA at full blast at the desk, and jedi shemaghs over the mouth and nose outside, before they became a political symbol), but I would certainly not want to be here in January and February. Although I understand that it's significantly better than it used to be.
