Okay, a bit late for Oz really, but a good thing to do anyway as a corrective to the absurd troglodytes who think switching off lights is a good thing.
It's supposedly about "raising awareness" of climate change (Jesus Christ, is there anyone anywhere in the world not friggen "aware" of effing climate change?), but really, what does this say about the state our civilisation has reached?
It's as if all of a sudden we've grown scared of the present and even more scared of the future.
Have we grown tired of living lives so much better than those who went before us? Who lived miserable lives in the dark and the cold, wracked by pain and disease?
Do we really want to go back to that? All on the basis of speculation about what may happen in the future driven by computer climate models that even the IPCC has to admit bare little or no relation to the actual observed climate?
Do we really think we can light, heat and cool our homes by bicycle power?
Don't laugh. Much was being made in Melbourne of a concert for Earth Hour being powered by bicycles. Welcome to your green future suckers.