[Virtual Water – a double-sided poster visualizing the water footprint of products and nations](http://www.traumkrieger.de/virtualwater/)
*The virtual-water content of a product (a commodity, good or service) is the volume of freshwater used to produce the product, measured at the place where the product was actually produced* – useful for other representations of water usage
(tags: [visualization](http://del.icio.us/djdunc/visualization) [seewatt](http://del.icio.us/djdunc/seewatt) [water](http://del.icio.us/djdunc/water))