What is urban growth?
the growth of a town or city
A place is only classified as Urban Growth if it has more than 1000 people in it. Urban Growth and Decline are a great part of out society. The increasing of Urbanization occurred during the twentieth century. Weather a Urban area is growing or declining depends on: Natural increase (birth minus death), rural urban and urban rural migration and international migration.
The difference between urbanization and urban growth is that urbanization is the increasing proportion of country's population living within urban areas (which would be given most likely in a percentage of the total population or a ratio), whereas urban growth is the increase in the size and population in an area over time, expressed in a number. So, urbanization is increase in proportion, whereas growth is the actual increase in number.