http://www.naturallynews.org/design/portland-high-rise-to-get-250-foot-tall-trellises/ Architects and federal officials plan one of the world's most extensive vertical gardens in downtown Portland - what amounts to a series of 250-foot-tall trellises designed to shade the west side of an 18-story office building. Sun, 17 Jan 2010 04:29:06 UTC en