(That's more than 1.6 tons of CO2 thrown up into the atmosphere just to keep your one single PC working! Image source: Local Cooling)
From Local Cooling:-
More than 30 billion kilowatt-hours of energy is wasted because many of us simply forget to shut down our computers when we aren't using them.
A barrel of oil contains 42 gallons and produces an average 556 kilowatt hours of electrical power. Now consider your computer. A good spec PC can use up to 200 watts per hour. If you have a CRT monitor, it adds a further 80 watts (TFT screens use less). So your system is consuming over 1 kWh of power for every four hours of normal use. If you leave your computer on 24/7, that's the equivalent of a whole barrel of oil every 90 days!
(Electricity usage on my laptop - CPU takes the most of the power usage)
Change your lifestyle – shutdown the PC if you are going for lunch (saves at least 45 minutes of electricity usage) or leaving for home.
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