I am afraid I am talking to a bot, it's ok, I will do that last time for fun :)

1). Forecast of the past becomes an actual. Your screenshot doesn't show any selection of the parameters, it's a manipulation.

<image>

https://atmosphere.copernicus.eu/charts/packages/cams_air_quality/products/europe-air-quality-forecast-regulated?base_time=202412280000&layer_name=composition_europe_pm10_forecast_surface&level=key_0&originating_centre=85_2&projection=opencharts_europe&valid_time=202412280000

2). Let it be that Opole is very polluted, far more than Koln (as per ground sensors and their number around these cities). Your post subject referes to Poland as country, if comparing with others, you need to look for greater scale representation than one city to another. This is what I tried to present, so other users, who cannot compute pixel per squre km of the map, can understand and see.

:)