This Green Over Grey Wall is North America's Largest Living Wall

 - Nov 1, 2010
References: gizmag
Designer firm Green Over Grey has given Canada the largest green living wall of North America. Covering 3,000 square feet, the wall can be seen at the Semiahmoo Public Library and the Royal Canadian Mounted Police Facility in Surrey, British Columbia.

Featuring more than 10,000 individual plants, Green Over Grey’s wall will cause no harm to the building. Due to its eco-friendly feature, the wall is capable of absorbing and cleaning pollutants to improve health for visitors and employees.