[BrianMik]

Originally Posted by Moonfish

If a house or a car could record the daily or weekly use or cost of consumption of energy, then one could measure and make it lower.

• Lights that if left on turn them selves off with in 10/30 mins.
• A warning in a car that tells you that you have exceded your normal average weekly mileage/consumption, this would make you aware of it and help you plan to reduce a number of journeys to save or make up the difference.
• Also an indicator that showed you that you were actually reducing your energy consumption, on a daily/Weekly/Monthly setting.

.

Sorta like the Toyota Camry Hybrid:

Originally Posted by CNNMoney

A battery pack takes up some of the Camry Hybrid's trunk space but makes up for it by helping to increase fuel economy. The speedometer and fuel economy gauges glow more brightly as average fuel economy rises during a trip.
Drive very gently and you'll see a flashing "Excellent! Excellent! Excellent!" in the gauge cluster when you switch off the ignition.

http://money.cnn.com/galleries/2008/...ficient/4.html