Architects are tackling the problems of the concrete jungle with ambitious schemes using green technology to grow forests in the sky. According to Christopher Woodward, a writer for the Financial Times:  ” The most exciting new tower in the world is under construction in Milan, Italy ” 
This vertical forest will span across two towers that have fabulous balconies designed to house these trees.
If  we are talking about optimizing space, this vertical forest will consist of 900 trees, 5,000 bushes and 11,000 plants.  This forest, designed by architect Stefano Boeri, will produces oxygen and cuts down on all the noise pollution in Milan. If this same number of trees, bushes and plants were planted horizontally around these houses on the ground, it would require 50,000 square meters of land and 10,000 square meters of woodland.