Cities takes up 2 % of the surface of the planet but houses 50% of the habitants of earth. The EDITT tower now under construction in Singapore takes the green roof concept and morphs it, by greening not just the roof, but the sides and interior of a giant 26-story tower. 50% of the water used by the inhabitants will be supplied from natural rainfall and water reuse through built-in filter systems, and solar power will supply 40 per cent of its energy needs.
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