Some annoying language mistakes (primarily misspellings). The interface could include e.g. displaying more than one graph at a time. All in all, decent work
"Severe" I think is the spelling, not "savere". Except for those language mishaps, it's tip-top.
Air index Europe isnt work, only Polish index
Bardzo wygodna (czytelna!) i po prostu ładna, wygodna apka!
Keep up to date with the air quality throughout the country! Not a poisonous smog!
The application of the Chief Inspectorate for Environmental Protection "Air Quality in Poland"