The study compared different emission inventories to see which one is best for predicting air quality in Europe. They used a model to simulate air pollution levels in 2015 with three different inventories: CAMS-REG-AP, EMEP, and EDGAR. The results showed that despite differences in emissions, all three inventories gave similar results. EDGAR was slightly better for PM2.5, while EMEP was slightly better for NO2. The biggest differences were in Eastern Europe. Overall, the study suggests that the EDGAR inventory, which is global and independent, can be used effectively for air quality modeling in Europe.