In this week’s readers’ Q&A session, Yvo de Boer, the man who led the UN into the Copenhagen climate talks and is now an advisor to KPMG, answers your questions.

On the final day of the Cancun climate talks, Yvo discusses the progress made towards a comprehensive global climate treaty, the (lack of) future for a global carbon tax, and how crucial emissions trading schemes are.

Next in the hotseat is Peter Voser, the chief executive of Shell, who will be answering your questions on this site next Friday, December 17th. Send in your questions for consideration by the end of today – Friday, December 10th – to energysource@ft.com.

But for now, over to Yvo: