Urban change, migration and megacities Typeit

Rapid urbanisation leads to an increasing population size in towns and cities, as well as the physical expansion of urban areas. When a city reaches a population of over 10 million, the city becomes known as a . When people move from countryside areas to cities and towns it is known as rural-urban . People move to cities and towns for various reasons. The reasons for encouraging people to move to urban areas are known as factors. On the other hand, the reasons for encouraging people to leave a rural area are known as factors. One of the main reasons people move to an urban area is to find work. These people are sometimes called migrants. As population increases in urban areas, more people tend to have access to healthcare and are experiencing a better standard of living, especially in LICs and NEEs. This leads to people living longer, having healthier children that live into adulthood and leads to further population increase. This type of population increase is called . In some countries, mostly HICS, people are moving away from the urban areas to rural areas. This is known as .