Spiral-shaped large scale urban farming

For those of you who haven't heard of this quite fabulous interpretation of the urban farming concept. A swedish company called Plantagon has designed giant globe-shaped urban greenhouses with a rotating spiral-shaped terrace filled with food producing plants. The first is currently being built in the swedish city of Linköping, but the natural target should of course be dense megacities.

A solution for the massive urbanization going on around the globe? Instead of growing food on the countryside and transporting it halfway around the world to our cities, this space-efficient solution could actually make urban farming possible on a bigger scale!

This is one way that nature would design urbanization. Right?

http://www.youtube.com/watch?v=Gzim4hTGRQE
http://www.plantagon.com/

Samuel R