The Economist Intelligence Unit Report ( EIU 2010) stated thai the most livable cities tend to be those which are mid-siszed and have lower population densities usuallv in wealthier countries, Vancouver. Vienna and Helsinki are examples. Sustainability objectives are more difficult to achieve in hot highly populated cities like Karachi, Lagos and Harare. Masdar is an example of a modem city being developed in Abu Dhabi and if successful will be the first carbon and waste neutral eco-city when it is completed in 2016-2020 (Tang 2011).The growth in world urban populations is rapid and expected to reach 70％ by 2050. Mega or hyper cities with populations of over 20m like Tokyo, Chongqing, Mexico City .Delhi, Mumbai, Shanghai, Jakarta, Karachi, New York ,Sao Paulo and Lagos are emerging; megqctites with over 10m people like Cairo. Istanbul, Paris and London are growing in number foof see Appendix 1). Throughout history cities like Athens, Florence, Rome, Venice, Vienna, Amsterdam and London have been notable centers of culture, wealth creation and innovation which suggests that even though densely populated cities bring environmental stresses and high demands on infrastructures the buzzy atmosphere created by so many rich and variegated human contacts is a stimulus for creativity and offers opportunities for innovation (Dodgson and Gann 2011) even though some of these cities do not feature in the top livable cities as classified by EIU or Monaclc (shop@monocle.com) for example. City life is more likely to be 24/7 than rural life and this also gives a vibrant pulse to the citv aura.