One of the key geographical developments over the last two centuries has been that of urbanisation. In recent years this has exploded globally, particularly in developing countries. Between 2009 and 2050, the world population is expected to increase by 2.3 billion, from 6.8 to 9.1 billion. At the same time, urban populations are projected to increase by 2.9 billion, from 3.4 billion in 2009 to 6.3 billion total in 2050. In developing countries, urbanisation ...
