Can You Save the Planet by Switching to a “Black” Google?

“Over the past few weeks I’ve come across dozens of websites
promoting the idea that switching over to using a version of Google
that had a black background as opposed to a white one would save me
money/electricity/the planet…

“The first thing that we needed was a baseline figure for power
usage for both the LCD and the CRT. The LCD panel was fitted to a
PC running Windows Vista with the default desktop while the CRT was
on a system running Ubuntu, again with the default desktop…”