"...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
Certo, sara' solo un po' piu' complicato cercare le cose al buio, ma e' per un'ottima causa. :-)