Here is the event video trailer for Greenroofs & Walls of the World™ Virtual Summit 2011. Check out http://www.virtual.greenroofs.com for more information and to register for this event like no other. Music provided by Dan-O at http://www.danosongs.com and Apple, Inc. Images provided royalty free by think4photop, vichie81, Pixomar of FreeDigitalPhotos.net.
