In two weeks' time, I'll be speaking at the Passivhaus Trust debate 'Zero: How low can we go?' which is all about the pros and cons of the nearly zero-energy target, including what role Passivhaus has to play and whether it's even the right target to chase. I'll be speaking alongside Anne-Marie Robinson of the Greater London Authority and Jonathan Hines of Architype, and it is all happening on the evening of Wednesday 25 January. The complete programme and link to book tickets is here.