Senator BIRMINGHAM (South Australia) (14:36): Mr President, I ask a supplementary question. Given that the conclusion and ratification of—quoting the government's own submission—'an agreement with legally binding mitigation commitments by all major economies' remains at best a distant aspiration, why has the Minister for Climate Change and Energy Efficiency ditched this requirement for binding action, which was restated as recently as May this year, and instead declared Australia ready to join a second commitment under Kyoto as soon as the end of this month?