I realy pefer to use the Google Black search engine, black looks smooth clear.

One Black Google search engine, Blackl, uses 100% renewable energy and small data transfers to save energy. This is helpful as even if the black background does not save much, there are other eco friendly measures in place. Their address is http://www.blackl.com.

Interesting arguments, but the point of view that a black background can't save any energy is now out of date from what I can tell, at least for mobile phones. On AMOLED based screens you can use multiple times less power with a black background instead of white! OLED based devices are growing in popularity and are in broad use now. Most other popular display types save power too displaying black like CRTs and plasma screens. As for LCDs, many of them do have negligible differences but no harm is done displaying black over white. There's more info on it all at Black Google Mobile which hosts a black Google for phones.

Given the energy required for data transfers I use Google Black. This black google It also uses renewable energy so it's a no brainer for me. A Blackl Google will definitely become better with the new screens that are coming out but they are still a small part of all screens out there.