Mr President, I ask a further supplementary question. I point out to the minister that these are not allegations by me or the coalition, they are allegations by industry leaders. Holden's chief executive officer, Mike Devereux, has said that a carbon price of between $20 and $30 a tonne would raise the costs of production in Australia by $40 million to $50 million. Minister, what would such increases do the ability of Holden's Australian produced cars to compete with South-East Asian produced vehicles coming from countries which do not have a carbon tax?