Turning down the thermostat is the most effective way an individual can reduce their energy consumption, according to an expert.
Cambridge University physics professor David Mackay pointed out the value of this individual action.
Writing on the BBC website he said: "Turning the thermostat down (or the air-conditioning in hot climates) is the single most effective energy-saving technology available to a typical person.
"Every degree you turn it down will reduce your heating costs by ten per cent; and, speaking of Britain at least, heating is likely to be the biggest form of energy consumption in most buildings."
Reducing energy consumption would help cut bills as well as carbon emissions which contribute to climate change.
The professor also suggested using a single measurement unit ? kilowatt hours (KWh) ? to assess energy consumption and reduction.
He said that on average a Briton uses 125KWh a day for transport, heating, manufacturing and electricity.
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