Question

What other technological development encouraged growth and migration to the sun belt in the postwar era?

Answer 1

Air conditioning--with very hot temperatures, Americans preferred to stay in the northern states. Air conditioning convinced many to move South. 

The South offered rich nature and industries thriving in particular oil. However, many Americans did not want to live in the hot conditions of the South. Air conditioning created an added appeal to live in the Southern states in particular Texas, Arizona, and New Mexico.