He recommended investing money in measures such as insulation and better thermostats if you are serious about cutting your carbon emissions and subsequently your energy bills.
"If you build a building that is just as energy-hungry as every other building, and you put a few wind turbines and solar panels on the outside that addresses a few per cent of that building's energy consumption, you have not achieved anything," Professor King explained.
The Energy Saving Trust recommends insulating your loft, tanks and pipes, or taking simple draft proofing measures, as a great way to save on energy bills. It also advises comparing and switching energy supplier.
Click here to run an energy price comparison, and see if you could be paying less for your gas and electricity.