CONTENT STATEMENT
Human migrations impact physical and human systems (e.g., stress on food supplies in refugee camps, removal of natural obstacles to movement, harvest productivity and migrant labor, calls for an official language in countries with high immigration, reduction in city tax revenues due to urban emigration).
CONTENT ELABORATION
As migrations occur, there are impacts on physical and human systems. For instance, migrations associated with suburbanization can result in reduced animal habitats where suburbs are built. They also can alter traffic patterns on roadways connecting the suburbs to places of work and central cities requiring new traffic engineering studies.
EXPECTATIONS FOR LEARNING
Analyze the impacts of migration on physical and human systems, using geographic representations of particular places at different points in time.