Sunday, November 22, 2009

Causes of population change

population is always dynamic. It never remains constant. So, the change in the size a population means the change in the number and composition of people. Birth and migration are the main causes of population change. population of any place increases due to birth and in-migration or immigration and decreases due to the death and out-migrate0n or emigration. Thus, birth, death and migration change the size of population of any country.


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