
"If Google had a black screen, taking in account the huge number of page views, according to calculations, 750 mega watts/hour per year would be saved."
In response Google created a black version of its search engine, called Blackle, with the exact same functions as the white version, but obviously with lower energy consumption:
Help spread the word... use www.blackle.com Make this your homepage!
http://www.blackle.com/