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The Tree House serviced apartments set a Guinness World Record as the world’s largest vertical garden. The building’s green wall measures 24 storeys tall and is expected to save more than $500,000 in energy and water costs annually. A natural insulation, it's primary function is to serve as a vertical green lung and it also has a rainwater harvesting system. Three sky gardens add to the vertical greening at the 7th, 13th and 19th floors. <br />
With a growing urban population, high-rise buildings are an increasingly prevalent feature cities across the world. Land is a major constraint in most Asian cities and in the face of high-density urbanisation, the only way to build is upwards. In the dense, urban environment of Singapore, where land area is severely limited, high-rise buildings have typified the urban fabric for years.