Vertical Gardens

http://communities.canada.com/vancouversun/blogs/inthegarden/archive/2011/07/14/from-grey-to-green-the-beauty-of-vertical-gardens.aspx

Once in a while someone has a world-class idea and has the technology, the skill and the artistry to carry it off.  This is an example of that.  It is quite remarkable.  It at once beautifies ugly grey buildings, turning them into living green masterpieces.  There's another benefit too; all this plant-life creates much needed oxygen for people in the cities to breathe.