The 18 new “supertrees” in Singapore’s Bay South garden are gigantic trellises for exotic plants, but they also double as exhaust tubes and supports for sustainable infrastructure.

The brightly colored concrete and steel structures rise at varying heights up to 164 feet, and support some 200 plant species including orchids, neoregelias, and bougainvilleas. Eleven of the towers will support photovoltaic cells and rainwater harvesting technology, while also venting warm air from the underground cooling system of adjacent conservatories. A 420-foot-long aerial walkway will link two 138-foot-high supertrees to give visitors a bird’s-eye view of the gardens, and the tallest will house a restaurant in its “canopy.”

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