4 ms·
i don't have a study, but i live in santiago, which has smog in winter, and buying an air filter cured (or at least coincided with the cure of) my bronchitis.
by andrewcooke 13y ago
i don't have a study, but i live in santiago, which has smog in winter, and buying an air filter cured (or at least coincided with the cure of) my bronchitis.