Even if you don’t use a USB-device, the fact it’s plugged in to your computer means that it is consuming energy. Even if that energy is used to light a small LED or LCD display. It might be convenient to have all of your USB devices plugged in at once, but it’ll save you energy to unplug the devices you only use on occasion.

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Andrew Davey, a 13-year-old who lives in Knaphill, Surrey, UK has created a search engine website that can help people save energy. Andrew got the idea from a Mark Ontkush, who concluded that an all-white web page uses 74 watts of energy compared to 59W from an all-black webpage. Therefore changing from using a white web page to a black one would save up to 15W every time it’s displayed.

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If you want to save some energy with your PC, there are a number of very simple tips you can use without buying a new computer or buying some energy saving gadget.

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