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 bio-fuels.
The entire "Gardens by the Bay" includes many more visionary and sustainable systems. Opened to public on June 29 2012.
