So, as I understand it, this "Earth Hour" bizzo involved the citizens of Christchurch turning the lights off for an hour last night at 8pm. Apparently, the intent (according to http://www.earthhour.org.nz/)was to "...take a stand against one of the planet's biggest threats - climate change." (Incidentally, climate change is a constant - has King Canute's lesson been lost in these uneducated times?)
The message I took from Earth Hour was the rather odd one that burning candles is better for the environment than using electric lights. I mean, how likely is it really that burning things will be better for the environment than using electricity which, in this country anyway, comes largely from renewable sources? What next? Send a message against global warming by switching off the heat pump and burning some coal in the good ole fireplace?