Singapore’s SuperTrees! Enormous vertical gardens in the form of 150-foot-tall tree-like structures. The structures support solar panels, collect rainwater, provide ventilation for two major underground plant conservatories. The 18 structures are also planted with over 200,000 plants; the horticultural trimmings are composted into biofuels.

The entire “Gardens by the Bay” includes many more visionary and sustainable systems. Opens June 2012.

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