The “Sustainable Cities Index” by ARCADIS examines 50 cities from 31 countries across a range of sustainability indicators and results show that European cities performed better overall than other continents, taking seven out of the top 10 rankings, while Australia’s Sydney and Melbourne both finished in the top 20.
The 50 cities are ranked in each of the three sub-indices, “People”, “Planet” and “Profit”, and a breakdown shows in which respects cities are doing well, and in which they need improving on.
Frankfurt, London, Copenhagen, Amsterdam, Rotterdam, Berlin, Seoul, Hong Kong, Madrid and Singapore made up the top 10 while Sydney narrowly missed out, coming in at number 11 on the overall Sustainability Cities Index"
http://www.architectureanddesign.com.au/news/sydney-ranked-11th-and-melbourne-17th-on-global-su