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Wednesday, February 8, 2017, 15:15

'Vertical forest' to help clear air

By Cang Wei in Nanjing

Asia's first "vertical forest", which helps reduce air pollution and save energy, will be built in Nanjing, Jiangsu province, next year.

The project, the world's third, will consist of two tower blocks in Jiangbei New District whose facades will be covered with 1,100 trees and 2,500 cascading plants and shrubs.

Those plants will produce about 60 kilograms of oxygen a day and absorb 25 metric tons of carbon dioxide a year, according to Nanjing Yangzi State-Owned Investment Group, an investor in the project.

A 200-meter-tall tower will mainly hold offices, and a 100-meter tower will include a hotel with 247 rooms.

Cai Long, president of Yangzi Group, said the towers' design has been adjusted to allow the balconies to support the weight of trees that can grow to 9 meters high.

"Each tree planted on the balconies will be tested in a wind tunnel to prove it can remain vertical in storms," Cai said.

He said the vertical forest has many advantages, including regulating microclimate environment, isolating noise and reducing the heat flows between buildings and the outside environment.

'Vertical forest' to help clear air
Architect Stefano Boeri stands in front of the world's first "vertical forest" in Milan in August. (Fotogramma)

'Vertical forest' to help clear air
A picture taken on July 24, 2015 shows a general view of the Bosco Verticale towers (Vertical Forest) in the Porta Nuova area in Milan. (AFP PHOTO / GIUSEPPE CACACE)

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