http://blog.au.fujitsu.com/?p=526

Given the increases in services and solutions to date, very little information has been made available about the sustainability and environmental benefit of a virtual desktop solution. With the rise in energy costs and environmental compliance the total environmental benefits of a virtual desktop solution have been to date undervalued. Fujitsu has published a white paper that discusses the closely linked subjects of energy use and carbon emissions around the desktop environment and looks at the potential decreased energy costs of deploying a virtual desktop solution.