Briefly discuss rural-urban migration and the recent trends of suburbanization
What will be an ideal response?
Answer: The industrial revolution (primarily during the 1800s) is credited to be the spark that began rural-urban migration in Europe and North America. The percentage of people living in urban areas in the United States, for example, increased from 5 percent in 1800 to 50 percent in 1920. Nearly 90 percent of the population in the United States and other developed countries now live in urban areas.
In recent years, large-scale rural to urban migration has occurred in developing countries of Asia, Latin America, and Africa. Worldwide, more than 20 million people are estimated to migrate each year from rural to urban areas. The principal reason for this rural-urban move is economic.
The trend has now shifted in developed countries. Today most intraregional migration in rich countries is from cities out to suburbs., leading to a decline in the population of cities. The major reason for the large-scale migration to the suburbs is not related to employment, , but rather the attraction of a suburban lifestyle, including large homes, open spaces and privacy. Developed countries witnessed a new migration trend during the late twentieth century. For the ?rst time, more people immigrated into rural areas than emigrated out of them. Net migration from urban to rural areas is called counterurbanization. The reasons are similar to those of suburbanization.
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Which statement about average stream velocity is true?
A)Velocity is higher in the upper reaches where gradients are steeper. B)Velocity is constant along the river's course. C)Velocity decreases downstream because the gradient is less steep. D)Velocity increases in the downstream direction. E)Velocity decreases downstream because of frictional forces.
A measure of the volume of soil void space relative to the total volume of earth material is called:
a. porosity b. permeability c. hydraulic conductivity d. void ratio
What is the IUPAC name of propyl tert-butyl ketone?
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