4 ms·

I am sure cars contribute, but I believe the majority comes from factories outside of the city and from homes, which primarily burn coal to keep warm. Beijing

by dmor 14y ago

I am sure cars contribute, but I believe the majority comes from factories outside of the city and from homes, which primarily burn coal to keep warm. Beijing is downwind from a lot of that.

justin66 14y ago
> I am sure cars contribute I doubt it. At the insane particulate levels they're discussing the air should be a lot cleaner coming out of the car than it was going in. Even if they don't have catalytic converters (anyone??) they've at least got _air filters_.