Ever wondered how much Energy you 'waste' while 'Googling'? "About 74 watts" for every page you browse. So how about a Black version of Google?
Blackle, (black+Google) is a search engine that is all black and uses Google's web-search interface to search through web-pages. The site is developed and maintained by Heap Media. To quote the site,
We encourage you to set Blackle as your home page. This way every time you load your Internet browser you will save a little bit of energy. Remember every bit counts! You will also be reminded about the need to save energy each time you see the Blackle page load.
I tried a few searches there. All the results were as expected from an ordinary Google search. But they were few in number. All the google advanced operators are working. Even the URL is showing a Google favicon! Wanna go eco-friendly? Switch to Blackle! ;)