China is building a forest city using the ideas of Italian architect Stefano Boeri. Boeri is known for his “vertical forest towers” that are being built in Switzerland and Italy. The new Chinese city will host 30,000 people and will be clad in trees and plants—not just in the parks, gardens and city streets, but over building facades too. This will total 40,000 trees and almost one million plants, drawn from more than 100 species. It will absorb an estimated 10,000 tons of C02 and 57 tons of pollutants each year, plus it will produce a claimed 900 tons of oxygen annually.