[luciusdomitius]

In case you are actually asking a question - most environmental guidelines in today's EU cities are the result of court cases. Both my hometown and the city I currently live in have been found guilty of neglecting air quality multiple times and ordered to take action. And yeah - in a libertarian (actually an-cap) world it wouldn't be a city, but a municipal services corporation with participatory ownership (a la UK Premier League).

But then again I am not really an anarcho-capitalist, but an extremely mild minarchist (imagine Raegan without his naiveness or Thatcher without her inferiority complex). So even this doesn't represent my opinion.