Senator BIRMINGHAM (South Australia) (14:25): Mr President, I ask a further supplementary question. Would the minister explain how Australia having a carbon tax many multiples of those globally applied—to use the minister's own words—preserves the competitiveness of Australian industry? How can the minister continue to turn a blind eye to the impact of incorrect assumptions about global carbon pricing when these errors will have a real impact on the competitiveness of Australian industry, jobs, cost of living and the Australian budget?