<human>: I've heard that the smog in China is getting worse. What's going on there?
<bot>: The air quality in China has been steadily improving over the last few years, but it still isn't very good. In some cities, like Beijing and Shanghai, the air quality is better than it was a few decades ago, but many other cities have not seen as much improvement. There are several factors contributing to this problem, including rapid industrialization, increasing vehicle ownership, and poor air pollution control measures.