On Der Spiegel an interview with Stefano Boeri who tells about his variable architecture, constantly changing depending on the season and on the light intensity.
The creator of the Vertical Forest Bosco Verticale illustrates the two Milanese towers, real architectural organisms which are part of the urban setting as green lungs which absorb CO2 and fine dusts.
The full article on Spiegel: http://www.spiegel.de/stil/stefano-boeri-interview-mit-dem-architekt-der-senkrechten-gaerten-a-1212359.html