A green wall is a wall, either free-standing or part of a building, that is partially or completely covered with vegetation and, in some cases, soil or an inorganic growing medium. The concept of the green wall dates back to 600 BC with the Hanging Gardens of Babylon. The larger green walls concept has been utilized with innovative hydroponics technology. The vegetation for a green façade is always attached on outside walls; with living walls this is also usually the case, although some living walls can also be green walls for interior use. For living walls there are many methods including attaching to the air return of the building to help with air filtration. They are also referred to as living walls, biowalls, vertical gardens or more scientifically VCWV (vertical vegetated complex walls).
Famous quotes containing the words green and/or wall:
“Just across the Green from the post office is the county jail, seldom occupied except by some backwoodsman who has been intemperate; the courthouse is under the same roof. The dog warden usually basks in the sunlight near the harness store or the post office, his golden badge polished bright.”
—Administration for the State of Con, U.S. public relief program (1935-1943)
“I think we will live through his term, Archie, and I’ll tell you something, old man, if they don’t stop hammering me, first Bryan for not enforcing the Anti-Trust Law and Wall Street for enforcing it, they may succeed in electing me to another term whether I want it or not.”
—William Howard Taft (1857–1930)