a new ordinance from the mayor 's office blames its innumerable pizzerias . in 2015 , san vitaliano exceeded the threshold for emissions 114 times , compared to 86 times in milan , another badly polluted italian city , the paper says . san vitaliano , a town of 6,000 inhabitants north of naples , has one of the highest rates of air pollution in italy . so what 's polluting san vitaliano ? according to il mattino newspaper , it is more polluted than beijing , while nearby naples - usually seen as one of italy 's worst offenders in terms of air quality - seems like " a perfumed garden " in comparison . an edict issued by the mayor of san vitaliano , just outside of naples , bans the use of wood - fired stoves in bakeries and eateries including pizzerias unless their owners install special filters to reduce air pollution . a town in italy has outlawed wood burning pizza - making as a measure to curb soaring pollution . bad air quality is a longstanding problem for san vitaliano . to put that into perspective , the citizens of milan , lombardy 's industrial capital , spent 86 days breathing unsafe air .