Blacktop in Calexico

[something] attracts immigrants in hard times
The southwest is suffering rapid change
Coal-burning plants multiply and the Four Corners grow dingy
The Grand Canyon is overrun by motorized rafters and transistorites
Our lust for energy dams the rivers
Missile sites, bombing ranges nuclear testing, and mock desert warfare all disturb Lummis' classic southwest.
When blowing dust annoys the urbanites, their reaction is to blacktop the desert.