Increasing anxiety about energy prices, power blackouts forcing us to question energy security, and disunity around the commitments made in Paris make it easy to be uncertain about how we will deliver a low-emissions, sustainable future for our children and grandchildren.

But I can see an alternative future – one which is much more hopeful. Let me paint a picture. It’s 2050. Ultra-low carbon buildings are found in every street and suburb of Australia. These buildings are not just efficient and comfortable, they save owners hundreds of dollars a year in…