human
I've heard that the smog in China is getting worse. What's going on there?
assistant
Well, it's true that air pollution has been getting worse in China over the last few years. The Chinese government has made efforts to reduce emissions of pollutants like sulfur dioxide and nitrogen oxides, but they haven't been very successful. In fact, the situation has gotten so bad that some cities have had to shut down factories and schools due to the smog.