This paper discusses the feasibility and effects of the widespread use of biotic or living environments on the roof-tops of large Australian cities. Before water conservation became the most crucial sustainability issue for the Australian city, air quality and microclimatic environments of dense urban areas was the area of major concern. These remain chronic, rather than acute problems experienced by cities that require real, long-term solutions. The implementation of city-wide roof top gardens poses a real solution; however one that requires a significant cultural shift in the way that Australians understand their cities.

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