Urbanisation is the leading sector on which humans are working; the ever-growing population is spreading globally and constantly moving into cities. Major urbanisation activities are taking place in the developing world. Over the past 50 years, cities have expanded into the land around them at a rapid rate. Highways and transport systems have been built, and valuable farmland has been lost. Globally, urbanisation levels will rise dramatically in the next 40 years-by 70%, with a population of almost 6.4 billion (UN Population Division 2007). According to the UN-Habitat 2008 report ‘The State of the World’s Cities 2008/2009: Harmonious Cities’, every day 193,107 new city dwellers are added to the world’s urban population, which translates to slightly more than two people every second. For the years 2000-2005, in developed nations, the total increase in urban population per month was 500,000, with an annual growth rate of 0.54%, compared to 5 million in the developing world, with an annual growth rate of 2.67% .