OCAD student Michael Tampilic presented Vert Rain Terrace at the Rocket 2008 industrial design show. It is an interesting combination of rainwater harvesting and green wall.
"Vert is a rain terrace: a rainwater harvester and vertical garden. This project establishes sustainable water practices through the harvesting of rain, and brings the advantages of a living wall to the backyard through vertical gardening. Vert alleviates a homes reliance on public utility systems while beautifying unused vertical space."
see the larger original here
It was a beautifully put-together model.
All pictures used with permission of Michael Tampilic. ::Vert Rain Terrace