I still think earth hour is nothing more than a gimmick.

If people are serious about reducing energy consumption/environment etc. They should really be
doing more in regards to alternative, clean energy (i.e. solar), reducing cars on the road, getting rid
of Hummers and 4WDs in the city etc.
Even something like allowing people to wear more casual, more appropriate clothes in summer instead
of suits, thus not using the air-con as much does a lot more. (it takes far more energy to heat/cool a
space than to light up a space)