The term urban agglomeration refers to the population contained within the contours of a contiguous territory inhabited at urban density levels.

Single-use developments are commonplace at high, medium, and low urban density, but low-density mixed-use developments are rare.

However, the link between urban density and aspects of sustainability remains a contested area of planning theory.

Zoning reforms that allow greater urban density as well as designs for walking and bicycling can greatly reduce energy consumed for transportation.

The exhibit traced urban density and the rise and fall of cities around the world.