In my opinion, “urban sustainability” is a concept of maintaining, managing and developing of urbanization for human-beings’ living to extend their history in the future, which covers several fields such as transport network connection; physical and social functional facilities and utilities; physical and natural environment and ecosystems; economic, cultural and civilization values; and potential and practical natural resources. Indeed, the big challenge is facing to how high density of population in the current cities.
I am coming from Shanghai City of China and spending approximately 6 years-life in Auckland, New Zealand. I found that Shanghai and Auckland has a big contrast is the density of population, which dominates more big differences of each urban development reflecting on the urban spaces and formation of dwelling types (or building characters). Simply, as a typical city of the skyscrapers, Shanghai, which has a huge amount of high-rise apartments and some private and public open spaces as extreme high density of population. However, low-density population in Auckland results local residences can have sufficient space to live, such as a type of detached house.
Therefore, the world has no uniform standard to regulate the urban sustainability, which must follow the details of country situation.
