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:
“There was an old man lived out in the wood,
His trade was a-cutting of Broom, green Broom;
He had but one son without thrift, without good,
Who lay in his bed till ‘twas noon, bright noon.”
—Unknown. Broom, Green Broom (l. 1–4)
“Something inspires the only cow of late
To make no more of a wall than an open gate,
And think no more of wall-builders than fools.”
—Robert Frost (1874–1963)