tery-powered device reveals exactly how much electricity is being used, how Studies have shown that a single family can easily consume twice as much as their next-door neighbours. When people in charge of their homes know their electricity use is being monitored, if falls dramatically. In another study, where people were given the chance of comparing their energy consumption with the same month in the previous year or with their neighbours, the upshot was an energy saving of 5 percent. So keeping track of our energy consumption will very likely make us switch off the lights when we leave the kitchen.
the cost of electricity per hour changes, and how much CO2 the household is producing. In the UK for example, each £100 (US$201) of electricity saved at home means 500 kg of CO2 avoided at the power station, and almost a quarter of a tonne of fossil fuel saved.