The air quality in Beijing is better than that in Shanghai.

Professor Zhuang Guoshun, an expert in PM2.5 research in China, said: We generally think that the air quality in Shanghai is better than that in Beijing. It can be said that it is at the level of PM 10, but at the level of PM2.5, the annual average of PM2.5 in Beijing is between 50 and 70, and that in Shanghai is between 40 and 70, which is basically the same level, not much better. In addition, it is worth noting that among the air pollution components in Shanghai, the components from human activities account for a high proportion. Specifically, the proportion of organic components in the air in Shanghai is very high, and the proportion of heavy metals is also very high, both of which are carcinogens PM2.5 So the air in Shanghai may be more toxic than that in Beijing at the same concentration. In fact, the incidence of lung cancer in Shanghai is very high, which is related to this.