Why is there much acid rain in Chongqing?

Excessive carbon dioxide, carbon monoxide, sulfur dioxide, etc. The waste gas discharged from industrial waste gas is converted into sulfuric acid in the air, forming acid rain. The severity of acid rain in Chongqing is also related to topography. Chongqing is located at the edge of Sichuan basin, and the atmosphere is not easy to flow and spread, resulting in the accumulation of pollutants. When the temperature is high in summer, there are many showers and acid rain, so there is a saying that there are more acid rain in summer than in other seasons.