Senator BIRMINGHAM (South Australia) (14:45): Mr President, my question is to the Minister representing the Minister for Climate Change and Energy Efficiency, Senator Ludwig. Miss you, Senator Wong! After 100 days of the carbon tax and with eight major changes to the carbon tax or associated programs during those 100 days, I ask the minister if the government finally believes it has its carbon tax legislation right and if the minister and the government will rule out yet more changes to the carbon tax or the plethora of carbon tax programs it operates?