Ms MARINO (Forrest—Government Whip) (14:19): My question is to the Minister for the Environment. I refer to figures released by the Clean Energy Regulator that show that the carbon tax has hit BHP Billiton Worsley Alumina with at least $56 million in higher costs in the last financial year. Are there any plans to further extend the reach of the carbon tax that will further impact on Western Australian businesses and families?