If the carbon tax is being introduced to force people to use less carbon (which is what I beleive it is intended to do) then what are my options for using less carbon?
Replacing wasteful globes with energy saving ones and turning them off when you are not in the room. More efficient air conditioning (evaporative if not in a high humidity area) and set the temperature a degree or two higher. And don't leave so many appliances on standby. It will make a huge difference in your electricity bill.
And if you are using electric heating or hot water: really, do you hate your money that much?
And of course solar panels work exactly as advertised, but take an investment and some years to pay back. (But they WILL pay back many times over.)
As for aircraft, we should find a way to encourage more efficient engines. More Diesel/Jet-A1 piston power would be a good start for larger aircraft. For LSAs (including GA training!) the new Rotax 912iS is awesome. So much less fuel (compared to standard 912, let alone to other 100 HP engines) that despite its higher cost it almost pays for its own overhaul, let alone carbon tax.
There are so many savings right on our doorstep that the real crime is that we need a carbon tax to open our eyes to them.
PS: Candles are very polluting. It is the irony of Earth Hour; the candles many people end up burning send more carbon into the atmosphere than a couple of low energy globes would have done!