At stake is the work's very constitution: It is no longer understood necessarily to take only one form — indeed, it may not require concrete form of any kind. (artforum.com)
Art is the process of expressing in concrete forms human emotions and aspiration, ranging from the simple joys of being to the most complex metaphysical expressions. (religion-online.org)
The house is built primarily of plastic foam, with insulated concrete forms below grade, and structural insulated panels above. (treehugger.com)