The kind of economy that was created in pittsburgh is called
a.
post-industrial.
c.
post-modern.
b.
commodity-based.
d.
twenty-first century.

Liquefaction is a. a quicksand-like condition arising in some wet soils during earthquakes. b. flooding caused by tsunamis. c. flooding of coastal areas due to tectonic subsidence. d. flooding caused by dam failure resulting from an earthquake.