Did you know there is a "black" version of the Google search engine that saves energy? The "green" version of Google is called "Blackle" and can be found at www.blackle.com. It's the same Google custom search, but with a black instead of white background. The main screen shows how many Watt hours have been saved to date by using Blackle instead of Google.
According to the Blackle web site:
Blackle saves energy because the screen is predominantly black. "Image displayed is primarily a function of the user's color settings and desktop graphics, as well as the color and size of open application windows; a given monitor requires more power to display a white (or light) screen than a black (or dark) screen." Roberson et al, 2002
I guess we can all do our small part to conserve energy!