it is a home that is powered by energy resources
make it
Of course they do. Every PC is different in how it works and how energy efficent it is depending on which make, model and even company you buy from.
They are a car that uses gas as a source of energy.
efficent
The most energy efficient commerical refrigeratiors would be anything within the JE brand , they make everything energy efficent these days and more enviromentaly friendly .
They use less power for an equivalent amount of illumination compared to incandescent lights which waste a lot of energy in heat.
That's means energy. No, 'efficient' means getting the best out of the energy that you are using. Energy in itself can be used efficiently or inefficiently.
The home keys on the keyboard make typing more efficient because the other fingers then know where to be while typing. The home keys are "F" and "J" on the letter keyboard and "5" on the number keypad.
Shortcut keys
More money is being saved when being efficent
I would suggest that call around to figure out which is the best energy efficient furnace, your electric or gas company may be able to help you out. You can also go to your local Home Depot, they sell energy efficent furnaces, and also have employees there that can answer any questions that you may have about the furnace.