Milan is plagued by choices unrelated to past urban planning, e.g. it is in an aeea where geography traditionally led to stagnating air (fog was a defining char

Milan is plagued by choices unrelated to past urban planning, e.g. it is in an aeea where geography traditionally led to stagnating air (fog was a defining characteristic of Milan) and this has impacts on pollution. But it's also really polluted because there are a bunch of really old heating systems. That would require almost zero planning, but it requires political will.