In order to be truly sustainable, we have to be more radical. We have to build houses in such a way as to make them “Triple Zero” – zero energy, zero emissions, zero waste. And we have to make them breathtakingly attractive and exciting. We can already achieve with the means presently at our disposal, there is no excuse whatsoever for building houses which are not at least energy-neutral. As sustainability becomes visible and comprehensible, it wins people’s hearts and minds, and thus also the opportunity for the implementation of sustainability on a broad basis.