I had an interesting experience a few days ago, when a government 'efficiency team' stopped by to install all kinds of energy efficient things in our house (lamps, switch, shower heads, isolation patches for our chauffage, etc...) and checked for water leaks, and isolation problems, etc.... Supposedly this could cut our total energy consumption by up to 10% per year. (Before they said it was going to be 20%).
Of course, we still waste lots of energy by using the car to get a bottle of coca cola in the nightshop that's only 300 metres away, etc...
All in all, I think I could slash my total energy consumption by 20%, easily. Just by being mildly "rational". And this without any serious effort. If I really were to do my best and consciously think about it each time I use electricity for a tool or tv, water, heating, cooling or a car, etc... I could definitely slash 30% off what I'm using now.
How much could you cut, you think? Being "mildly rational", installing some energy efficient appliances and not driving your car to a shop that's only 1 minute's walk away. So by not doing too much of an effort.




