My question is to the Prime Minister. I refer the Prime Minister to the statement by the Minister for Resources and Energy yesterday that a price on carbon is required to drive a transition in electricity generation from coal fired to gas fired power. Keith Orchison, who the minister praised last night at his book launch, has stated that a carbon price of $30 per tonne would be the minimum required to drive such a transition. Does the Prime Minister agree that a carbon price of $30 a tonne or more will be needed to reduce carbon emissions from electricity generation—yes or no?