This could also be a problem for cyclists on this forum. If we become carfree, we have to remember that the autmobile (purportedly) consumes 32% of a average household's total energy usage. 39% comes from electricity/heating.
Seems like we really need to have a societal discussion about where all this energy is being used. It is a shame to conserve it on one side and waste it on the other. We probably need to break usage down to a finer grain. For example, how much energy gets used if you consistently forget to turn off your coffee machine.
I've thought of this myself. All my commuting over the last year and then I take an airplane trip to visit my mother.