8. Melbourne, Australia
PM 2.5 annual mean, ug/m3: 7.70
It is interesting that all major cities in Australia have good air quality, including Melbourne which ranks 8th on our list of cities with the cleanest air in the world. Improvements of air quality started with the introduction of emission controls on cars and industry as well as removal of lead from petrol. Public transport is very organized with free city center tram route. Also, the city center has been free from private vehicles since 1990. Inhabitants of Melbourne are encouraged to use bicycles as means of transport, and there are around 416 miles of bike paths around the city. If you love biking, Melbourne is the right city for you. You can even bike to Canberra and enjoy the clean air on the way there.
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