This powerpoint presentation covers part 3.a of the A-Level Geography OCR specification.Global migrationA case study of one AC to show how it influences and drives change in the global migration system. illustrate economic, political, and social factors to explain: patterns of emigration and immigration opportunities such as labour supply challenges such as border issues This presentation includes information about United States immigration as both facts and figures. Also information on the US immigration policy the admissions available under each situation. As well as stats about their interdependence with Mexico and the opportunities and challenges this bring Exam Board: OCR Subject: Geography Level: A-Level Resource Type: Presentation (revision) Year: 2024 Year Group/s: Year 12 and Year 13