Regarding air pollution, is it because of the smoke emitting from vehicles or the factories? You'd think, because China seems to be pushing their way into the t

Regarding air pollution, is it because of the smoke emitting from vehicles or the factories? You'd think, because China seems to be pushing their way into the top to becoming a tech-savvy country, that they will do something about it. I guess it's the price to pay for advanced technology, what do you think?