You must be wondering why a Black colored Google webpage can save energy, well the answer is, actually thousands of people uses Google search engine everyday and hour or so. Users idle, search through again and again and the majority of the screen area will display white color. To display white color a panel need more brightness and backlight to produce the white. Therefore by using a black colored Google search together we can save significant amount of energy without even noticing it.
From http://www.blackle.com/about/
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."
The most used Black Google search engine is at http://www.blackle.com/ , however it will only offer you the normal search engine without the image search and etc.
So as an alternative u can use Greasemonkey and javascript to change Google.com black .
1st, u must have the Greasemonkey addon, click here to know more about Greasemonkey.
2nd, once u have Greasemonkey go to this site and install the script.
And were done, you are ready to surf the web while knowing that you are conserving the earth!
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