Szombathely is a county situated along the western border of Hungary, with a land coverage of 97 ha. and approximately 78,000 inhabitants. It has a wet continental climate, influenced by proximity to the Alps. The city is structured around a roman-medieval core, with a larger industrial sector to the east, and more sprawling residential areas elsewhere. Due to agriculture and housing, only around 18% of the landscape is forest, with much of the historic fauna and flora disappearing. 31.4 ha natural area is under protection, most of it to the west of the city, constituting its ecological network core. In the city center, the green infrastructure is characterized by 11 parks, and two natural rivers (Gyöngyös, Perint). Regarding air quality, there are two main challenges: air pollutant emissions concentrated around recent industrial areas on the eastern side threatening the city’s historically clean air, and a growing/densifying residential building stock threatens to increase emissions/pollutants from car traffic.