Migration is the movement of people from one place to another. The reasons for migration can be economic, social, political or environmental. There are usually push factorspush factors: Factors that encourage people to leave the place in which they live and to move elsewhere. and pull factorspull factors: Factors which attract people to move to a new place. at work.
Migration impacts on both the place left behind, and on the place where migrants settle.

Illegal immigrants on the American/Mexican border
Migration is the movement of people from one place to another.
Internal migration is when people migrate within the same country or region - for example, moving from London to Plymouth.
International migration is when people migrate from one country to another - for example, moving from Mexico to the USA.
Emigration - when someone leaves a country.
Immigration - when someone enters a country.
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