With a growing population and migration, owning a house in cities is becoming more and more difficult. However, on the other hand, it is also becoming ever more important to have one. The biggest problem is that of space. It is impossible to construct new houses without breaking down the old ones. Nevertheless, there are one way out of this situation. Designers are coming up with ‘Nano House‘ designs. Take a look at some of the most innovative housing solutions for people who have to live a nomadic existence. All these designs are products of revolution in portable green housing.