Exposure models for air pollutants in Asian cities have been lacking, making it hard to assess health risks. A new model was created for Hong Kong, China, to estimate exposure to different pollutants. The model can predict air pollutant levels with high accuracy and create maps showing where pollution is highest. The study found weak to moderate links between different types of pollutants, which could help understand their health effects better. This new model is a useful tool for studying how multiple pollutants affect people in densely populated urban areas.