Period 8: 1945-1980:
Key Concept 8.3.I.B "B) As higher education opportunities and new technologies rapidly expanded, increasing social mobility encouraged the migration of the middle class to the suburbs and of many Americans to the South and West. The [BLANK] [BLANK] region emerged as a significant political and economic force."
What two words fill in the [BLANK] [BLANK] above, the name of the region of deserts/semi-deserts, Mediterranean and humid subtropical climates that have seen significant population growth since the 1960s?
Sun Belt