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Alotting designated garden space in many city environments is dirty business, but the Urbanarbolism green wall in Elche, Spain presents a prodigious solution. A measly foyer flower bed would not do for this office building, and a three-storey gravity-defying garden was literally built-up instead.

Climbing up the core of the structure, the Urbanarbolism green wall in Elche is visible from offices on the first three floors through glass walls. The refreshing result of a collaboration with Paisajismo Urbano, this upended garden exploits bamboo, evergreens and ivy to optimize interior CO2 management for passive air purification.