This video shows the process behind the visualisation 'Urban water needs: Can we keep up?' by Matthew Laws, Hal Watts and Luke Bennett.
Go to http://www.halwatts.co.uk or http://www.matthewlaws.com for more information.
The visualisation came runner up in the 'Visualising the World Water Dat Challenge' hosted by http://www.visualizing.org
"Elegantly literal, the sponges grow in height according to how thirsty the country will be, generating a stark topography of future needs for urban domestic water."