A few decades ago, zero to low carbon cities that are sustainable and energy efficient were something of a pipe dream, but now they are becoming reality. And they need to be because as the world population expands, so do our cities and their carbon emissions.

The United Nations estimates that the World’s city living populations will increase by 66 per cent by 2050, up 12 per cent from today’s figures.  This will add another 2.5 billion people to urban populations, with 90 per cent of these being concentrated in Asia and Africa. In Australia, infrastructure…