To the Leader of the Opposition's question: last year this parliament put a price on carbon. It did that because we want our nation to seize a clean energy future. The Leader of the Opposition himself has been in favour of putting a price on carbon. He went to the 2007 election on a platform of introducing an emissions trading scheme. On this side of the parliament, we have always said that the best way of tackling climate change—the cheapest, the most effective way—was to put a price on carbon—

Mrs Bronwyn Bishop interjecting—