They also find nature overcoming destruction to thrive again. And dead zones where man-made devastation persists.

Whenever humans abandon their structures, nature reclaims them. This is apparent, for example, in the phenomenon of America’s Dead Malls.

Images and articles about Dead Malls.

The 100: Mount Weather
This is a facility that was built before the nuclear war and designed to shelter the human race from fatal radiation.

Season 2 reveals that the large bunker is a sealed and uncontaminated home to a group of survivors of the nuclear war. It has its own underground water reservoir.

WHEN SPACE IS LIMITED, IS THERE ANYTHING WORTH SAVING OTHER THAN HUMAN LIFE?

In The 100, Mount Weather is also a storage facility for art. The collection is partly displayed and partly preserved in a warehouse.

THERE ARE NO ANIMALS ON EITHER THE ARK OR INSIDE MOUNT WEATHER.

Other descendants of humans that did survive the nuclear war are using derelict structures for re-appropriated purposes.

A subway station becomes a prison and a dining room at different times.

THERE IS NO SPACE TO WASTE AND NO SPACE IS WASTED.