© Dimitar Harizanov
© Gianluca di Loia
© Dimitar Harizanov
© Raw Vision Studio
© Stefano Boeri Architetti
© Stefano Boeri Architetti
© Paolo Rosselli
Height, floor space, and the number of units are the
usual key figures in investor-financed high-rise construction. But 800 trees, 4,500 shrubs, and 15,000 other plants are the key figures Stefano Boeri cites for his Bosco Verticale (vertical forest) in Porta Garibaldi, Milan. With the two green residential towers, 110 and 76 m high, the Italian architect and his team realized a vision that has driven generations of architects. But opinion was divided: though many were enthusiastic, others criticized it as a “noble forest for high earners”, anti-architecture, and a waste of resources.