Is the smog in Shanghai as serious as that in Beijing?

No. According to the urban environmental pollution index, the smog air index in Beijing is higher than that in Shanghai, with serious air pollution in Beijing accounting for 0.22, serious air pollution in Shanghai accounting for 0.04, and the smog air index in Beijing is 20% higher than that in Shanghai. So the smog in Shanghai is not as serious as that in Beijing. Haze is a combination of fog and haze. Smog is very common in cities. In many areas of China, fog and haze are combined as disastrous weather phenomena for early warning and forecasting, which are collectively called "haze weather".