Late nineteenth-century American cities grew “outward and upward.” Des

Late nineteenth-century American cities grew “outward and upward.” Describe the technology that allowed these phenomena to occur and the consequences they had for city dwellers.

What will be an ideal response?

ANSWER
Technology: transportation (street cars, elevated railways); communication (telephone); construction materials (steel); electricity (elevators and lighting). Consequences: residential segregation; high land values; new skyline; crowding; night life.