PC left running throughout the night may have a loss equivalent to a few dollars in the electricity bill, and pollution is relatively limited. But leave the personal computers in American companies operating throughout the night contributes to the waste of 2.8 billion dollars.
 
The newspaper "USA Today" American energy company British "1", when the alliance to save energy, "the non-profit issued a report confirming that the operator leave the computer also causes emission of 20 million tons of carbon dioxide, or equivalent to 4 million vehicles launched.
The Executive Director of the "1 ie," Sommer Karaya the newspaper: "Staff does not feel any responsibility towards the electricity bills of the company, some companies insist on keeping the computer operator during the night until the development of programs," he said, adding that 63% of employees surveyed recently by saying that their companies to take additional measures to save energy.

The report said that companies in the U.S., half of 108 million computers are not extinguished at the end of working hours. The authors report that if the world turned off computers, which is about a billion of the night and only one can save enough energy to light a building, "Empire State" for a period of 30 years