Fig 1. When built, this 5000 sq. meter green facade in Westblaak in Rotterdam, the Netherlands will be the largest green screen in Europe (Source. www.architecturepost.org)

With over half the world population living in cities, new approaches to bringing vegetation and the many benefits of plants to urban areas are being developed. Green screens are a type of green wall system emerging as a viable green infrastructure technology. They not only have significant public benefits but also have a great deal of design flexibility that can be applied as a freestanding design feature, affixed to a building envelope, or integrated into an entire building site design. Although green walls have a long history, green screen technology innovations are relatively recent and so the potential of green screens is still being developed.