RHEL 7 CPU governor.

I don’t know if you have already heard about CPU governor.

With the global warming, IT culture should integrate the various mechanisms available for reducing computer consumption.
In a perfect world, during the idle periods servers should adjust their clock frequency to get significant power saving. They should even stop through some scalability mechanisms if possible.

If you think a better understanding of technology can help our earth, have a look at the CPU governor tutorial.