Senator CORMANN (Western Australia) (14:15): My question is to the Minister representing the Prime Minister. I remind the minister of the Prime Minister's commitment that 'there will be no carbon tax under a government I lead'. Why, then, does Australia have the world's biggest carbon tax? Honourable senators interjecting— The PRESIDENT: Order! Wait a minute, Senator Cormann. Order! On my right. Senator Cormann, like every other senator, is entitled to be heard in silence. When there is silence we will proceed. On both sides. Senator CORMANN: Thank you, Mr President. I again remind the minister that the Prime Minister made an emphatic promise before the last election that there would be no carbon tax under a government she leads. Why, then, does Australia have the biggest carbon tax in the world? It is a tax which is about to get bigger when Labor will hit families and businesses with yet another five per cent increase in the carbon tax.