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:
Please use www.blackle.com
Somewhere I read that each and every Google search produces 0.8 gms of CO2. The Google authorities claim that it's only 0.2 gms or so. So try to reduce Googling!!