Green Tip: Laptops Over Desktops
Most laptops go into low-power mode (or sleep) when left inactive, an important feature since the majority of computers are left on 24 hours a day. (Turn off your computer when it’s not in use to REALLY save energy.)
According to HES, the idea that computers should be left on at all times is a myth leftover from the days of heat-sensitive mainframes.
Image from Apple. Check out their Energy Star certified computers here.