My question is to the Prime Minister. Does the Prime Minister agree with modelling by the CSIRO and the Climate Institute released today that concludes a carbon price beginning at $15 increasing to $100 per tonne will increase petrol prices initially by 10 per cent and eventually by up to 51 per cent? Will the Prime Minister rule out a new petrol tax of 10c, 20c or 30c a litre as a result of his emissions trading scheme?