I really do thank the shadow Treasurer for that question because it just demonstrates how he has changed his spots when it comes to climate change. There was a time in this House when he said he was an avid supporter of climate change and that we needed a price on carbon, and he strongly supported the member for Wentworth in that endeavour. But I remember the day when he really lost the plot. It was when the leadership struggle was on in that party and he sent a message out on Twitter saying, 'Tell me what I believe in.'

Mr Hockey interjecting—