Which is the most polluted city in Fribourg?
- Ecublens52
- Mezieres52
- Romont52
- Rue52
- Surpierre52
- Vuisternens-devant-Romont52
- Alterswil51
- Attalens51
- Avry-sur-Matran51
- Belfaux51
- Bosingen51
- Corminboeuf51
- Cugy51
- Dudingen51
- Ependes51
- Estavayer-le-Lac51
- Flamatt51
- Giffers51
- Givisiez51
- Grolley51
- Kerzers51
- Kleinboesingen51
- Marly51
- Marsens51
- Matran51
- Praroman51
- Sales51
- Sankt Antoni51
- Schmitten51
- Tafers51
- Ueberstorf51
- Villars-sur-Glane51
- Villaz-Saint-Pierre51
- Vuadens51
- Bas-Vully50
- Courgevaux50
- Domdidier50
- Heitenried50
- La Roche50
- Murten/Morat50
- Pont-la-Ville50
- Rechthalten50
- Riaz50
- Treyvaux50
- Bulle49
- La Tour-de-Treme49
- Oberschrot49
- Plaffeien49
- Broc48
- Gruyeres48
- Charmey47
- Fribourg28
- Chatel-Saint-Denis17
