Since cities have changed a lot, thesize of the cities has grown enormously. Discuss the causes and consequence ofthe enormous size of cities. Nowadays, the maps of cities areupdated frequently. With the development of city, more and more suburbs becomeparts of the city. When the cities in the world are amplifying constantly,people discuss the topic hotly, the causes and consequence of the enormouscities. Different people have different answers by their respective views. In my opinion, the evolution of societyand the development of economy result in the growth of the vast size of cities.