A PC left running 24 hours per day would use £59 worth of electricity over a 12 month period and result in emissions of 250Kg of carbon dioxide a year.

Just leaving on a computer monitor overnight wastes enough energy to laser print 800 A4 pages.

Two thirds of the energy used by a PC/VDU is used by the VDU. Screen savers may save screens but not energy.

Up to 70% of computers and related equipment are left on all the time.

Equipment energy costs can be reduced by 20% just by turning off when not in use.