Urbanization Most cities are expanding in terms of population and land area, city inhabitants are daily reminded of this by the new high rise buildings and extended of bus routes. generally is a positive phenomenon, while the urbanization is not always welcomed. The expand of cities can attributed mainly to the influx of immigrant workers, as the result of increasing labor replacing machinery show up in traditional activities such as farming, surplus labor force lured by the prospect of employment and higher living standard of city. therefore, people from poorer regions come in millions. in order to accommodate an increasing population , cities are forced to expand. besides, the expansion is also necessitated by rapid economic growth. most cities are center for trade and industry, the development of which requires the use of land. vast stretches of land also has to be used to improve infrastructure. This kind of growth may led to dire consequences. as a matter of fact , its not quite easy for people come from countryside manage to fine a suitable job, not to mention the cost of living is much higher than rural areas, many newly arrived immigrant workers living in a miserable conditions, sharing a small room with four or five companions , its reasonable why they feel lose their sense of security or even extremely stressful. worse still,a huge population often puts so much pressure on public infrastructure which result in the local residence experience a decline in public service because it was designed only for a certain number of individuals. whats more, urbanization often causes severe environmental damage, trees, fields, even villages are sacrificed for the relenting pace of cities expansion. the only defensive against is balanced development of all areas, both rural and urban.