The new Australian PM changed his policy rather than the climate when it was revealed to him that supporting a 25% cut on 1990 carbon emission levels by 2020 would lead to large rises in electricity prices.
He is yet another of these politicians who thinks it is warm and friendly to say he wants to do something to curb carbon, but who finds the policies needed are too unpopular. Just like Labour here, they talk the talk but do not walk the walk.
The answer is to encoruage and incentivise people to be burn less energy, not pillory them with taxes and regulations. The public does not believe climate change theory sufficiently to welcome large increases in energy prices through higher taxes, or taxes on particular lifestyles that they have adopted.