The chemical equation that causes heavy pollution

SO2 H2S CO NO NO2, etc.

Mainly divided into sulfur-containing pollutants, carbon-containing pollutants, nitrogen-containing pollutants, and chlorine-containing pollutants.

Expansion: Heavy pollution weather: The Air Quality Index (AQI) is divided into six levels, from level 1 excellent, level 2 good, level 3 mild pollution, to level 5 severe pollution. Pollution, level six serious pollution. The pollutants monitored include sulfur dioxide, nitrogen dioxide, carbon monoxide, ozone, PM10 and PM2.5***. The air pollution meteorological condition forecast level standard is consistent with the air quality index (AQI) level standard and is divided into six levels. It clearly predicts the impact of meteorological conditions on air pollution, whether it is conducive to the diffusion and removal of pollutants, or the opposite. The indicators for heavy pollution weather warnings are air quality index and the number of days it lasts.