Senator JOYCE (Queensland—Leader of The Nationals in the Senate) (14:52): My question is to the Minister representing the Minister for Climate Change and Energy Efficiency, Senator Wong. I refer to Senator Wong's reply to Senator Cormann, where she said that pollution is free. Does she therefore believe that coal is free, fuel is free and power is free? Additionally, I refer to the Prime Minister's comments that a carbon tax will not increase the prices for families, trades and small businesses. Honourable senators interjecting— The PRESIDENT: Order! Senator Joyce is entitled to be heard. Senator JOYCE: I refer to the Prime Minister's comments yesterday that the carbon tax will not increase petrol prices for families, tradies and small businesses. Can the minister confirm that the electricity that oil refineries and service stations use will be exempt from the carbon tax? If not, won't the carbon taxes applied to these sectors increase the petrol price in contravention of the Prime Minister's promise?